Application Audio Capture (BETA) doesn't work with DuckDuckGo browser tabs

Operating System Info

Windows 11

Other OS

No response

OBS Studio Version

Other

OBS Studio Version (Other)

30.1.0 Windows Store version

OBS Studio Log URL

https://obsproject.com/logs/N7B1GQOynhO2a9Ei

OBS Studio Crash Log URL

No response

Expected Behavior

When I create new Application Audio Capture (BETA) source and select DuckDuckGo browser tab with audio it should capture its audio because if I do the same with Microsoft Edge browser tab with audio it works, so it seems there is a bug either in OBS or DuckDuckGo.

Current Behavior

When I create new Application Audio Capture (BETA) source and select DuckDuckGo browser tab with some audio it doesn't capture its audio so no slider movement in Audio Mixer.

Steps to Reproduce

1. Add new Application Audio Capture (BETA) source
2. In properties for that new source select DuckDuckGo.exe [Some browser tab with audio]
3. Click Ok and Audio Mixer slider for that Source doesn't move meaning it doesn't capture audio, but Desktop Audio mixer slider still works though
   ...

Anything else we should know?

No response

Start by reviewing the supplied OBS log and reproducing the issue on Windows 11 with OBS Studio 30.1.0 from the Windows Store. Compare Application Audio Capture behavior for a DuckDuckGo tab and an Edge tab, then determine whether the failure is in OBS or DuckDuckGo. Done means the cause is identified and the affected capture path has a verified fix or documented incompatibility.