WebM sound keeps playing when you push up/down arrow key

[MikeRich88]

1. Folder contains a webm and an mp4, both with sound.
2. Activate QuickLook on the webm.
3. Press up or down arrow key to highlight the mp4. (Or left/right key if it's icon view, etc.)
4. The mp4 starts showing with sound, but the webm sound is still going also!

Latest 2.21 version on Sonoma.