Hello everybody,
The issue we were experiencing (using Steam)
The game kept freezing for about 4 seconds about every minute (for my friend) and every 5 minutes for me.
We tried many things, but this is what worked for us eventually:
1. Turning off Steam Overlay for the game
2. Settings the exe files (bg3.exe, bg3_dx11.exe, LariLauncher.exe) to Run As Administrator (right-click the file, choose Properties, goto Compatibility tab, check 'Run this program as administrator').
We're not entirely sure if step 2 is necessary. More testing is needed.
But the game seems to be working great for us right now.
We also see some improvement to the overall fps in general.
Good luck!