Chrome-based browsers stutter in full-screen video when focused

I'm going crazy here and I'm hoping someone may have perspective. First some deets:

• Windows 11 24H2 (I think the problem correlates with moving to 24H2, but I can't be 100% certain as I didn't pick up on this theory until later, and after the rollback was no longer possible)
• GeForce RTX 4070 GPU
• AMD Ryzen 5600X CPU

Any videos I play in Google Chrome, Microsoft Edge, or an EdgeView-based app (such as Disney+) will stutter, play at a severely reduced framerate, and/or break up in various ways on screen if they're played in full-screen AND have focus. The moment I leave full-screen or click on anything else on another screen (and therefore reveal the taskbar on the main screen), performance returns fully. Also, if I turn off hardware acceleration the issue goes away, however I rely on that for a variety of web applications, so I can't leave it off.

I've tried upgrading my graphics card drivers (especially since 24H2 includes its own special GeForce drivers), doing a full wipe of the drivers and reinstalling from scratch, and turning on and off various Nvidia settings related to video (especially as I'm aware they have some upscaling and HDR abilities that only work in Chrome-based browsers). Nothing has made any difference.

Meanwhile if I load the same video sites in Firefox, with hardware acceleration enabled, the videos play in full screen without issue. Other video applications too, such as Plex, work without issue in full screen.

Has anyone else seen this and have any insight, or suggestions on other potential causes I may not be considering?