Preventing PC off

[leshkraven 4]

Emby Theater (Windows Store app, v2.317.2.0) is preventing my PC from sleeping and my monitor from turning off, even after playback has fully ended.

My Windows power settings are: screen off after 10 minutes, PC sleep after 45 minutes. These work correctly for every other app. When Emby Theater is left open after a movie finishes, the PC will stay fully awake with the display on for hours, I've had it stay on for 8+ hours overnight with nothing playing.

Importantly, this did not happen on my previous monitor (ASUS VG34VQL1B). It started after switching to a new monitor (ASUS XG34WCDG, HDMI 2.1). Same PC, same Windows install, same Emby Theater app and settings only the monitor changed. This suggests the app may be detecting something about the new display (HDR capability, refresh rate, or similar) and not releasing its background media playback lock correctly once that detection changes.

I'm aware Emby Theater uses the Windows backgroundMediaPlayback capability to prevent sleep during active playback, which is expected behaviour. The issue is that this lock does not appear to be released once playback stops it should only apply during active media playback, not indefinitely afterward.

System: Windows 11, Intel i9-13900K, RTX 4090, ASUS XG34WCDG monitor (HDMI 2.1)

Could someone look into whether the background playback lock is being released properly when playback ends, and whether display capability detection could be a factor?