Automatic1111 and all it's forks (forge/reforge/neo) try to crash my PC when i generate. What could the problem be?

I am using a 3060 12gb VRAM gpu. Look at this. It starts generating and once it is at 99% it takes 115 seconds, almost 2 minutes to do a last model movement. During this time my PC is FROZEN, the cursor doesn't move, it crashes the whole damn system. I tried to prevent fallback on GPU settings but the problem becomes worse. This only happens with A1111 and it's forks (forge/reforge/neo), with comfy i can casually generate nonstop without any problem. I sometimes forget i am generating images, it has no impact on my PC at all.