Audio delay removed from media source after transition

Operating System Info

Ubuntu 24.04

Other OS

No response

OBS Studio Version

31.0.0

OBS Studio Version (Other)

No response

OBS Studio Log URL

https://obsproject.com/logs/kdxzlDgFeNFqLsy2

OBS Studio Crash Log URL

No response

Expected Behavior

Audio delay as set in advanced audio properties should always be applied to the source.

Current Behavior

Having a scene with a media source on it, with an audio delay, after transitioning to another scene with a media source, and back to the original, the audio delay isn't applied anymore.

Steps to Reproduce

1. Create a scene with a media source (ideally one with easy desync detection like this)
2. Add a noticeable audio delay to it
3. Create a second scene with another media source
4. Close obs on the scene with the delayed source, reopen, start recording
5. Transition to scene 2, then back
6. Notice the delay is present in the recording before the transition, but not after.
   ...

Anything else we should know?

The video taken in that log, which showcases the issue can be found here.

Was also reproduced on Windows 11 and 30.2.3.

Reproduce the transition sequence with two media-source scenes and compare the recording before and after returning to the delayed source. Start with the provided OBS Studio log and reproduction video; the fix is complete when the configured audio delay remains applied after scene transitions on the affected setups.