Randomly dropping frames.

### Is there an existing issue for this?

- [x] I have searched the existing issues

### Is your issue described in the documentation?

- [x] I have read the documentation

### Is your issue present in the latest beta/pre-release?

This issue is present in the latest pre-release

### Describe the Bug

The issue occurs randomly. I’ve already tried several bitrate configurations, disabled HAGS, tested with FastSync, different NVENC profiles, changed the Ethernet cable and router. I only noticed the problem when the "5502" error appeared in Sunshine’s debug log.

### Expected Behavior

_No response_

### Additional Context

_No response_

### Host Operating System

Windows

### Operating System Version

Windows 11

### Architecture

amd64/x86_64

### Sunshine commit or version

2025.806.175625

### Package

Windows - installer (recommended)

### GPU Type

NVIDIA

### GPU Model

4060TI

### GPU Driver/Mesa Version

576.88

### Capture Method

Desktop Duplication API (Windows)

### Config

```Shell
av1_mode = 3
encoder = nvenc
fec_percentage = 30
global_prep_cmd = [{"do":"powershell.exe -executionpolicy bypass -file \"C:\\Users\\Magary\\Downloads\\ABDM\\Compressed\\MonitorSwapper\\StreamMonitor.ps1\" -n MonitorSwapper","elevated":false,"undo":"powershell.exe -executionpolicy bypass -file \"C:\\Users\\Magary\\Downloads\\ABDM\\Compressed\\MonitorSwapper\\UndoScript.ps1\" -n MonitorSwapper"},{"do":"","elevated":false,"undo":"powershell.exe -executionpolicy bypass -windowstyle hidden -file \"C:\\Users\\Magary\\Sunshine-AIO\\tools\\PlayniteWatcher\\PlayNiteWatcher-EndScript.ps1\" True"},{"do":"powershell.exe -executionpolicy bypass -file \"C:\\Users\\Magary\\Downloads\\ABDM\\Compressed\\ResolutionAutomation\\StreamMonitor.ps1\" -n ResolutionMatcher","elevated":false,"undo":"powershell.exe -executionpolicy bypass -file \"C:\\Users\\Magary\\Downloads\\ABDM\\Compressed\\ResolutionAutomation\\UndoScript.ps1\" -n ResolutionMatcher"}]
hevc_mode = 3
min_log_level = 1
minimum_fps_target = 55
notify_pre_releases = enabled
nvenc_preset = 1
wan_encryption_mode = 0
```

### Apps

```json
{
    "env":  {

            },
    "apps":  [
                 {
                     "name":  "Desktop",
                     "image-path":  "desktop.png"
                 },
                 {
                     "name":  "Steam Big Picture",
                     "cmd":  "steam://open/bigpicture",
                     "prep-cmd":  [
                                      {
                                          "do":  "",
                                          "undo":  "steam://close/bigpicture"
                                      }
                                  ],
                     "auto-detach":  true,
                     "wait-all":  true,
                     "image-path":  "steam.png"
                 },
                 {
                     "image-path":  "C:\\Users\\Magary\\Sunshine-AIO\\tools\\PlayniteWatcher\\playnite-boxart.png",
                     "name":  "PlayNite FullScreen App",
                     "wait-all":  false,
                     "exit-timeout":  0,
                     "auto-detach":  false,
                     "uuid":  "14D9821B-7EA2-48C2-9AF7-970608282F93",
                     "cmd":  "powershell.exe -executionpolicy bypass -windowstyle hidden -file \"C:\\Users\\Magary\\Sunshine-AIO\\tools\\PlayniteWatcher\\PlayniteWatcher.ps1\" FullScreen"
                 },
                 {
                     "image-path":  "C:\\Users\\Magary\\AppData\\Local\\Sunshine Playnite App Export\\Apps\\4f1c97af-a9e3-4450-8ce0-aaee37c2fe0d\\box-art.png",
                     "name":  "Prince of Persia The Lost Crown",
                     "wait-all":  false,
                     "exit-timeout":  0,
                     "auto-detach":  false,
                     "uuid":  "4F1C97AF-A9E3-4450-8CE0-AAEE37C2FE0D",
                     "cmd":  "powershell.exe -executionpolicy bypass -windowstyle hidden -file \"C:\\Users\\Magary\\Sunshine-AIO\\tools\\PlayniteWatcher\\PlayniteWatcher.ps1\" 4f1c97af-a9e3-4450-8ce0-aaee37c2fe0d"
                 },
                 {
                     "image-path":  "C:\\Users\\Magary\\AppData\\Local\\Sunshine Playnite App Export\\Apps\\c82477cd-7aac-472a-b08f-a22d0ff40a4e\\box-art.png",
                     "name":  "Metro Exodus Enhanced Edition",
                     "wait-all":  false,
                     "exit-timeout":  0,
                     "auto-detach":  false,
                     "uuid":  "C82477CD-7AAC-472A-B08F-A22D0FF40A4E",
                     "cmd":  "powershell.exe -executionpolicy bypass -windowstyle hidden -file \"C:\\Users\\Magary\\Sunshine-AIO\\tools\\PlayniteWatcher\\PlayniteWatcher.ps1\" c82477cd-7aac-472a-b08f-a22d0ff40a4e"
                 },
                 {
                     "image-path":  "C:\\Users\\Magary\\AppData\\Local\\Sunshine Playnite App Export\\Apps\\45379a99-f39a-4593-a785-b0e38566185e\\box-art.png",
                     "name":  "Hell Clock",
                     "wait-all":  false,
                     "exit-timeout":  0,
                     "auto-detach":  false,
                     "uuid":  "45379A99-F39A-4593-A785-B0E38566185E",
                     "cmd":  "powershell.exe -executionpolicy bypass -windowstyle hidden -file \"C:\\Users\\Magary\\Sunshine-AIO\\tools\\PlayniteWatcher\\PlayniteWatcher.ps1\" 45379a99-f39a-4593-a785-b0e38566185e"
                 },
                 {
                     "image-path":  "C:\\Users\\Magary\\AppData\\Local\\Sunshine Playnite App Export\\Apps\\c9a547ae-eda7-4833-b1fe-8676e96819e3\\box-art.png",
                     "name":  "Eriksholm: The Stolen Dream",
                     "wait-all":  false,
                     "exit-timeout":  0,
                     "auto-detach":  false,
                     "uuid":  "C9A547AE-EDA7-4833-B1FE-8676E96819E3",
                     "cmd":  "powershell.exe -executionpolicy bypass -windowstyle hidden -file \"C:\\Users\\Magary\\Sunshine-AIO\\tools\\PlayniteWatcher\\PlayniteWatcher.ps1\" c9a547ae-eda7-4833-b1fe-8676e96819e3"
                 }
             ]
}
```

### Relevant log output
[sunshine.log](https://github.com/user-attachments/files/21703199/sunshine.log)

```shell
[2025-08-09 22:45:56.835]: Debug: Network: each FEC block latency (min/max/avg): 0.01ms/0.05ms/0.01ms
[2025-08-09 22:45:56.835]: Debug: Network: each send_batch() latency (min/max/avg): 0.05ms/0.16ms/0.08ms
[2025-08-09 22:45:56.835]: Debug: Network: frame's overall network latency (min/max/avg): 0.06ms/0.19ms/0.10ms
[2025-08-09 22:45:58.452]: Debug: NvEnc: encoded frame sizes in kB (min/max/avg): 22.56/33.77/25.19
[2025-08-09 22:46:01.668]: Debug: Frame processing latency (min/max/avg): 1.90ms/2.60ms/2.04ms
[2025-08-09 22:46:01.683]: Debug: Frame capture sleep overshoot (min/max/avg): 0.02ms/0.56ms/0.27ms
[2025-08-09 22:46:16.835]: Debug: Network: each FEC block latency (min/max/avg): 0.01ms/0.02ms/0.01ms
[2025-08-09 22:46:16.835]: Debug: Network: each send_batch() latency (min/max/avg): 0.05ms/0.17ms/0.08ms
[2025-08-09 22:46:16.835]: Debug: Network: frame's overall network latency (min/max/avg): 0.07ms/0.19ms/0.09ms
[2025-08-09 22:46:18.452]: Debug: NvEnc: encoded frame sizes in kB (min/max/avg): 22.40/25.80/23.84
[2025-08-09 22:46:21.669]: Debug: Frame processing latency (min/max/avg): 1.90ms/2.50ms/2.03ms
[2025-08-09 22:46:21.700]: Debug: Frame capture sleep overshoot (min/max/avg): 0.02ms/0.65ms/0.28ms
[2025-08-09 22:46:36.836]: Debug: Network: each FEC block latency (min/max/avg): 0.01ms/0.02ms/0.01ms
[2025-08-09 22:46:36.836]: Debug: Network: each send_batch() latency (min/max/avg): 0.05ms/0.18ms/0.08ms
[2025-08-09 22:46:36.836]: Debug: Network: frame's overall network latency (min/max/avg): 0.07ms/0.21ms/0.10ms
[2025-08-09 22:46:38.469]: Debug: NvEnc: encoded frame sizes in kB (min/max/avg): 18.96/34.40/27.97
[2025-08-09 22:46:41.669]: Debug: Frame processing latency (min/max/avg): 1.90ms/3.70ms/2.06ms
[2025-08-09 22:46:41.700]: Debug: Frame capture sleep overshoot (min/max/avg): 0.01ms/0.71ms/0.28ms
[2025-08-09 22:46:56.851]: Debug: Network: each FEC block latency (min/max/avg): 0.00ms/0.06ms/0.01ms
[2025-08-09 22:46:56.851]: Debug: Network: each send_batch() latency (min/max/avg): 0.04ms/0.18ms/0.07ms
[2025-08-09 22:46:56.851]: Debug: Network: frame's overall network latency (min/max/avg): 0.05ms/0.21ms/0.09ms
[2025-08-09 22:46:58.485]: Debug: NvEnc: encoded frame sizes in kB (min/max/avg): 11.51/34.02/20.84
[2025-08-09 22:47:01.685]: Debug: Frame processing latency (min/max/avg): 1.90ms/4.30ms/2.07ms
[2025-08-09 22:47:01.716]: Debug: Frame capture sleep overshoot (min/max/avg): 0.02ms/0.93ms/0.30ms
[2025-08-09 22:47:16.851]: Debug: Network: each FEC block latency (min/max/avg): 0.00ms/0.06ms/0.01ms
[2025-08-09 22:47:16.852]: Debug: Network: each send_batch() latency (min/max/avg): 0.03ms/0.17ms/0.08ms
[2025-08-09 22:47:16.852]: Debug: Network: frame's overall network latency (min/max/avg): 0.04ms/0.20ms/0.09ms
[2025-08-09 22:47:18.501]: Debug: NvEnc: encoded frame sizes in kB (min/max/avg): 0.41/34.04/24.93
[2025-08-09 22:47:21.204]: Debug: type [IDX_INVALIDATE_REF_FRAMES]
firstFrame [10026]
lastFrame [10027]
[2025-08-09 22:47:21.207]: Debug: type [IDX_INVALIDATE_REF_FRAMES]
firstFrame [10026]
lastFrame [10028]
[2025-08-09 22:47:21.218]: Debug: NvEnc: rfi request 10026-10028 expanding to last encoded frame 10029
[2025-08-09 22:47:21.224]: Debug: type [IDX_INVALIDATE_REF_FRAMES]
firstFrame [10026]
lastFrame [10029]
[2025-08-09 22:47:21.235]: Debug: NvEnc: rfi request 10026-10029 already done
[2025-08-09 22:47:21.323]: Debug: type [IDX_INVALIDATE_REF_FRAMES]
firstFrame [10033]
lastFrame [10034]
[2025-08-09 22:47:21.323]: Debug: type [IDX_INVALIDATE_REF_FRAMES]
firstFrame [10033]
lastFrame [10035]
[2025-08-09 22:47:21.335]: Debug: NvEnc: rfi request 10033-10035 expanding to last encoded frame 10036
[2025-08-09 22:47:21.340]: Debug: type [IDX_INVALIDATE_REF_FRAMES]
firstFrame [10033]
lastFrame [10036]
[2025-08-09 22:47:21.352]: Debug: NvEnc: rfi request 10033-10036 already done
[2025-08-09 22:47:21.442]: Debug: type [IDX_INVALIDATE_REF_FRAMES]
firstFrame [10040]
lastFrame [10041]
[2025-08-09 22:47:21.442]: Debug: type [IDX_INVALIDATE_REF_FRAMES]
firstFrame [10040]
lastFrame [10042]
[2025-08-09 22:47:21.452]: Debug: NvEnc: rfi request 10040-10042 expanding to last encoded frame 10043
[2025-08-09 22:47:21.456]: Debug: type [IDX_INVALIDATE_REF_FRAMES]
firstFrame [10040]
lastFrame [10043]
[2025-08-09 22:47:21.468]: Debug: NvEnc: rfi request 10040-10043 already done
[2025-08-09 22:47:21.610]: Debug: type [IDX_INVALIDATE_REF_FRAMES]
firstFrame [10050]
lastFrame [10052]
[2025-08-09 22:47:21.619]: Debug: NvEnc: rfi request 10050-10052 expanding to last encoded frame 10053
[2025-08-09 22:47:21.622]: Debug: type [IDX_INVALIDATE_REF_FRAMES]
firstFrame [10050]
lastFrame [10053]
[2025-08-09 22:47:21.635]: Debug: NvEnc: rfi request 10050-10053 already done
[2025-08-09 22:47:21.685]: Debug: Frame processing latency (min/max/avg): 1.90ms/4.40ms/2.09ms
[2025-08-09 22:47:21.716]: Debug: Frame capture sleep overshoot (min/max/avg): 0.02ms/0.87ms/0.30ms
[2025-08-09 22:47:21.739]: Debug: type [IDX_INVALIDATE_REF_FRAMES]
firstFrame [10057]
lastFrame [10059]
[2025-08-09 22:47:21.741]: Debug: type [IDX_INVALIDATE_REF_FRAMES]
firstFrame [10057]
lastFrame [10060]
[2025-08-09 22:47:21.752]: Debug: NvEnc: rfi request 10057-10060 expanding to last encoded frame 10061
[2025-08-09 22:47:21.752]: Debug: NvEnc: rfi request too large, generating IDR
[2025-08-09 22:47:21.756]: Debug: type [IDX_INVALIDATE_REF_FRAMES]
firstFrame [10057]
lastFrame [10061]
[2025-08-09 22:47:21.767]: Debug: type [Unknown] { 5502 }
---data---
01001E000001000700160000008101800149270000
---end data---
[2025-08-09 22:47:21.770]: Debug: NvEnc: idr frame 10062
[2025-08-09 22:47:21.770]: Debug: NvEnc: rfi request 10057-10061 already done
[2025-08-09 22:47:21.854]: Debug: type [IDX_INVALIDATE_REF_FRAMES]
firstFrame [10064]
lastFrame [10066]
[2025-08-09 22:47:21.856]: Debug: type [IDX_INVALIDATE_REF_FRAMES]
firstFrame [10064]
lastFrame [10067]
[2025-08-09 22:47:21.868]: Debug: type [Unknown] { 5502 }
---data---
01001E000017000800180000006702660250270000
---end data---
[2025-08-09 22:47:21.869]: Debug: NvEnc: rfi request 10064-10067 expanding to last encoded frame 10068
[2025-08-09 22:47:21.869]: Debug: NvEnc: rfi request too large, generating IDR
[2025-08-09 22:47:21.874]: Debug: type [IDX_INVALIDATE_REF_FRAMES]
firstFrame [10064]
lastFrame [10068]
[2025-08-09 22:47:21.886]: Debug: NvEnc: idr frame 10069
[2025-08-09 22:47:21.887]: Debug: NvEnc: rfi request 10064-10068 already done
[2025-08-09 22:47:22.022]: Debug: type [IDX_INVALIDATE_REF_FRAMES]
firstFrame [10075]
lastFrame [10076]
[2025-08-09 22:47:22.025]: Debug: type [IDX_INVALIDATE_REF_FRAMES]
firstFrame [10075]
lastFrame [10077]
[2025-08-09 22:47:22.036]: Debug: NvEnc: rfi request 10075-10077 expanding to last encoded frame 10078
[2025-08-09 22:47:22.039]: Debug: type [IDX_INVALIDATE_REF_FRAMES]
firstFrame [10075]
lastFrame [10078]
[2025-08-09 22:47:22.052]: Debug: NvEnc: rfi request 10075-10078 already done
[2025-08-09 22:47:22.141]: Debug: type [IDX_INVALIDATE_REF_FRAMES]
firstFrame [10082]
lastFrame [10083]
[2025-08-09 22:47:22.141]: Debug: type [IDX_INVALIDATE_REF_FRAMES]
firstFrame [10082]
lastFrame [10084]
[2025-08-09 22:47:22.152]: Debug: NvEnc: rfi request 10082-10084 expanding to last encoded frame 10085
[2025-08-09 22:47:22.155]: Debug: type [IDX_INVALIDATE_REF_FRAMES]
firstFrame [10082]
lastFrame [10085]
[2025-08-09 22:47:22.169]: Debug: NvEnc: rfi request 10082-10085 already done
[2025-08-09 22:47:22.354]: Debug: type [IDX_INVALIDATE_REF_FRAMES]
firstFrame [10094]
lastFrame [10096]
[2025-08-09 22:47:22.356]: Debug: type [IDX_INVALIDATE_REF_FRAMES]
firstFrame [10094]
lastFrame [10097]
[2025-08-09 22:47:22.369]: Debug: NvEnc: rfi request 10094-10097 expanding to last encoded frame 10098
[2025-08-09 22:47:22.369]: Debug: NvEnc: rfi request too large, generating IDR
[2025-08-09 22:47:22.372]: Debug: type [IDX_INVALIDATE_REF_FRAMES]
firstFrame [10094]
lastFrame [10098]
[2025-08-09 22:47:22.386]: Debug: NvEnc: idr frame 10099
[2025-08-09 22:47:22.386]: Debug: NvEnc: rfi request 10094-10098 already done
[2025-08-09 22:47:22.471]: Debug: type [IDX_INVALIDATE_REF_FRAMES]
firstFrame [10101]
lastFrame [10103]
[2025-08-09 22:47:22.473]: Debug: type [IDX_INVALIDATE_REF_FRAMES]
firstFrame [10101]
lastFrame [10104]
[2025-08-09 22:47:22.485]: Debug: NvEnc: rfi request 10101-10104 expanding to last encoded frame 10105
[2025-08-09 22:47:22.485]: Debug: NvEnc: rfi request too large, generating IDR
[2025-08-09 22:47:22.489]: Debug: type [IDX_INVALIDATE_REF_FRAMES]
firstFrame [10101]
lastFrame [10105]
[2025-08-09 22:47:22.503]: Debug: NvEnc: idr frame 10106
[2025-08-09 22:47:22.503]: Debug: NvEnc: rfi request 10101-10105 already done
[2025-08-09 22:47:22.591]: Debug: type [Unknown] { 5502 }
---data---
01001E00001500070017000000BC06BB0675270000
---end data---
[2025-08-09 22:47:23.121]: Debug: type [IDX_INVALIDATE_REF_FRAMES]
firstFrame [10142]
lastFrame [10142]
[2025-08-09 22:47:23.122]: Debug: type [IDX_INVALIDATE_REF_FRAMES]
firstFrame [10142]
lastFrame [10143]
[2025-08-09 22:47:23.135]: Debug: NvEnc: rfi request 10142-10143 expanding to last encoded frame 10144
[2025-08-09 22:47:23.138]: Debug: type [IDX_INVALIDATE_REF_FRAMES]
firstFrame [10142]
lastFrame [10144]
[2025-08-09 22:47:23.152]: Debug: NvEnc: rfi request 10142-10144 already done
[2025-08-09 22:47:23.209]: Debug: type [Unknown] { 5502 }
---data---
01001E00000400060011000000D30AD20A9E270000
---end data---
```

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Uh oh!

Uh oh!

Randomly dropping frames. #4144

Is there an existing issue for this?

Is your issue described in the documentation?

Is your issue present in the latest beta/pre-release?

Describe the Bug

Expected Behavior

Additional Context

Host Operating System

Operating System Version

Architecture

Sunshine commit or version

Package

GPU Type

GPU Model

GPU Driver/Mesa Version

Capture Method

Config

Apps

Relevant log output

Metadata

Assignees

Labels

Type

Projects

Milestone

Relationships

Development

Uh oh!

Randomly dropping frames. #4144

Description

Is there an existing issue for this?

Is your issue described in the documentation?

Is your issue present in the latest beta/pre-release?

Describe the Bug

Expected Behavior

Additional Context

Host Operating System

Operating System Version

Architecture

Sunshine commit or version

Package

GPU Type

GPU Model

GPU Driver/Mesa Version

Capture Method

Config

Apps

Relevant log output

Metadata

Metadata

Assignees

Labels

Type

Projects

Milestone

Relationships

Development

Issue actions