when I arrived in act 3, baldus gate, i have massive delays between my actions/attacks in combat, the sound and animatons plays but the actual attack has a 2-3 sec delay. The game worked fine until act 3. I can't even throw things, because they stuck in the air, and fall down at the throwers position. I found some topics with same the issue on reddit, so it seems to be a general problem.

act1/act2 ar not affected.

Does anyone here have the same problem or any fix for this?

i have the steam version, with news patch/hotfix and newest nvidia driver. (gtx 3080 with amd 5600x)

I've tried so far:
steam offline
fullscreen mode
windowed mode
tried different graphic/interface settings
changed performance in task manager
deleted older save games
did all conversations in my camp