Marvel SNAP (fullscreen, on PC) will not record headset/mic audio (all other applications/screens will)

I'm in OBS studio using the Game Capture option, and using the "Capture Specific Window" option, that references the executable. This works on every other screen and game I've tried, catching both my audio and the application's audio.

In Marvel SNAP, I can get the game audio no problem, and OBS studio is showing as if it's getting my audio, but none of my voiceover appears in the recording.

Very new at this, so any help would be much appreciated!
 
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