Browser Sources: Unexpected behavior when 'Control audio via OBS' is checked

Operating System Info

Windows 11

Other OS

No response

OBS Studio Version

30.1.2

OBS Studio Version (Other)

No response

OBS Studio Log URL

https://obsproject.com/logs/f8qs1OL4QQxzEMmw

OBS Studio Crash Log URL

No response

Expected Behavior

I used alerts from Streamlabs and Blerp.
They should show a gif or video and play a sound if a correspondent events fires.

Current Behavior

The alerts work as expected for a seemingly unpredictable time.

I think it takes about 10 to 20 minutes until the alerts stop working.
The sounds won't work anymore. Animations sometimes still work.

Steps to Reproduce

1. Add a browser source with Streamlabs or Blerp alerts (It probably works with anything that uses sound and/or video)
2. Make sure "Control audio by OBS" is checked in the browser source's properties
3. Activate "Monitor and Output" for the browser source's audio
4. Start a stream (not sure if necessary)
5. Wait 10 to 20 minutes
6. Fire an event that should trigger an alert

Anything else we should know?

No response

Start with the linked OBS log and the Browser Source properties, then follow the six reproduction steps using Streamlabs or Blerp alerts. Done means audio and animations continue working after the reported 10–20 minute period with “Control audio via OBS” and “Monitor and Output” enabled.