Hi murn, thank you for your quick response.
It's weird that I've tried the model/scene on a different PC (7950X+7900XTX) which works just OK while other models/scenes have same kinda issue on the PC that I'm using (13900K+4090). I'm starting to feel the recent Intel CPU issues would be the...
I've tried "freeze the physics" of the person atom but problem still exist. Everything works just fine while the person atom is not moved by a curser.
Attached below are serveral pictures which may help explain the issue better. plz help