Bug Description
Seelen UI v2.5.6 enters a crash-restart loop on Windows 11 25H2. The application repeatedly crashes with an access violation in ucrtbase.dll (exception code 0xc0000005) and automatically restarts, sometimes as fast as every 5 seconds. This causes visible UI "flashing" as all widgets reload each cycle.
The crash pattern is always the same: a burst of "Reaping window" events followed by a full restart of the application. The WMI error HResultError { hres: -2147217396 } also appears at every startup but the WMI repository itself is verified as consistent (winmgmt /verifyrepository returns OK).
Steps to Reproduce
Install Seelen UI v2.5.6 (NSIS installer from GitHub releases) on Windows 11 25H2
Use a dual monitor setup with different scale factors (1.25 + 1.0)
Use the system normally — the crash loop starts after a few minutes of use
Environment
Seelen UI version: 2.5.6 (NSIS, clean install — previous Store + NSIS dual install was also affected)
OS: Windows 11 Home 25H2 (Build 26200.8037)
CPU: AMD Ryzen 7 5700X
GPU: NVIDIA GeForce RTX 4060
RAM: 16 GB
WebView2 Runtime: 146.0.3856.62
Locale: fr-CA
Monitors:
Primary: ES-G27F2Q — 2560x1440, scale factor 1.25
Secondary: ES-27X3AL — 1920x1080, scale factor 1.0
Crash Details (from Windows Event Viewer)
Application: seelen-ui.exe (version 2.5.6.0)
Faulting module: ucrtbase.dll (version 10.0.26100.7623)
Exception code: 0xc0000005
Fault offset: 0x000000000006e7cf
This crash is logged dozens of times per session. The crash is always in ucrtbase.dll at the same offset.
Relevant Log Excerpt
[2026-03-21][10:52:08] Starting Seelen UI v2.5.6
[2026-03-21][10:52:09] ERROR WMI(HResultError { hres: -2147217396 })
[2026-03-21][10:52:12] Reaping window: 1a0416
[2026-03-21][10:52:13] Starting Seelen UI v2.5.6 <-- restart after 5 seconds
[2026-03-21][10:52:15] ERROR WMI(HResultError { hres: -2147217396 })
[2026-03-21][10:52:21] Reaping window: 1090460
[2026-03-21][10:52:23] Starting Seelen UI v2.5.6 <-- restart after 8 seconds
[2026-03-21][10:52:24] ERROR WMI(HResultError { hres: -2147217396 })
Troubleshooting Already Done
Verified WMI repository is consistent (winmgmt /verifyrepository → OK)
Disabled USB Selective Suspend in power settings
Uninstalled TranslucentTB (was also crashing alongside Seelen UI)
Uninstalled PowerToys (potential shell conflict)
Disabled ElgatoAudioControlServer (was crash-looping alongside Seelen UI)
Uninstalled both Store and NSIS versions, cleaned %APPDATA% and %LOCALAPPDATA% config folders, reinstalled only NSIS version — same crash loop persists
Issue occurs with a completely fresh config (no themes, plugins, or customizations)
Additional Context
This appears related to issue #1416 — same WMI error, same ucrtbase.dll crash pattern. The dual monitor setup with mixed scale factors (1.25 + 1.0) may be a contributing factor. The crash pattern always involves a burst of "Reaping window" events immediately before the restart, suggesting explorer.exe shell instability on Windows 11 25H2 triggers the crash.
Bug Description
Seelen UI v2.5.6 enters a crash-restart loop on Windows 11 25H2. The application repeatedly crashes with an access violation in ucrtbase.dll (exception code 0xc0000005) and automatically restarts, sometimes as fast as every 5 seconds. This causes visible UI "flashing" as all widgets reload each cycle.
The crash pattern is always the same: a burst of "Reaping window" events followed by a full restart of the application. The WMI error HResultError { hres: -2147217396 } also appears at every startup but the WMI repository itself is verified as consistent (winmgmt /verifyrepository returns OK).
Steps to Reproduce
Install Seelen UI v2.5.6 (NSIS installer from GitHub releases) on Windows 11 25H2
Use a dual monitor setup with different scale factors (1.25 + 1.0)
Use the system normally — the crash loop starts after a few minutes of use
Environment
Seelen UI version: 2.5.6 (NSIS, clean install — previous Store + NSIS dual install was also affected)
OS: Windows 11 Home 25H2 (Build 26200.8037)
CPU: AMD Ryzen 7 5700X
GPU: NVIDIA GeForce RTX 4060
RAM: 16 GB
WebView2 Runtime: 146.0.3856.62
Locale: fr-CA
Monitors:
Primary: ES-G27F2Q — 2560x1440, scale factor 1.25
Secondary: ES-27X3AL — 1920x1080, scale factor 1.0
Crash Details (from Windows Event Viewer)
Application: seelen-ui.exe (version 2.5.6.0)
Faulting module: ucrtbase.dll (version 10.0.26100.7623)
Exception code: 0xc0000005
Fault offset: 0x000000000006e7cf
This crash is logged dozens of times per session. The crash is always in ucrtbase.dll at the same offset.
Relevant Log Excerpt
[2026-03-21][10:52:08] Starting Seelen UI v2.5.6
[2026-03-21][10:52:09] ERROR WMI(HResultError { hres: -2147217396 })
[2026-03-21][10:52:12] Reaping window: 1a0416
[2026-03-21][10:52:13] Starting Seelen UI v2.5.6 <-- restart after 5 seconds
[2026-03-21][10:52:15] ERROR WMI(HResultError { hres: -2147217396 })
[2026-03-21][10:52:21] Reaping window: 1090460
[2026-03-21][10:52:23] Starting Seelen UI v2.5.6 <-- restart after 8 seconds
[2026-03-21][10:52:24] ERROR WMI(HResultError { hres: -2147217396 })
Troubleshooting Already Done
Verified WMI repository is consistent (winmgmt /verifyrepository → OK)
Disabled USB Selective Suspend in power settings
Uninstalled TranslucentTB (was also crashing alongside Seelen UI)
Uninstalled PowerToys (potential shell conflict)
Disabled ElgatoAudioControlServer (was crash-looping alongside Seelen UI)
Uninstalled both Store and NSIS versions, cleaned %APPDATA% and %LOCALAPPDATA% config folders, reinstalled only NSIS version — same crash loop persists
Issue occurs with a completely fresh config (no themes, plugins, or customizations)
Additional Context
This appears related to issue #1416 — same WMI error, same ucrtbase.dll crash pattern. The dual monitor setup with mixed scale factors (1.25 + 1.0) may be a contributing factor. The crash pattern always involves a burst of "Reaping window" events immediately before the restart, suggesting explorer.exe shell instability on Windows 11 25H2 triggers the crash.