I have installed the beta bundle, I believe that is where the current driver is from. I also have the Intel drivers utility installed but it doesn’t show a newer version available past 30.0.100.9864 (Release Date: 8/20/2021), which is what is currently installed.
Haven’t had a chance to do the BIOS update yet, maybe get around to that tonight. edit: but likely won’t until out of beta
Playing around in Windows a bit more this afternoon, my solution from above is looking likely to be the fix.