After pcb, the thrashing totally disappeared and my character was able to move around with perfect fluidity for minutes.
I tried a couple of other times, worked each time.
So I decided: I wanted to create a shortcut so that you can pcb by pressing a key.
Problem is, now pcb doesn't seem to do anything anymore??? On the same save, exact same spot, the effect is zero. I don't mean it's less than it was, there's just no effect whatsoever, as if the command was doing nothing.
Has this happened to anyone else??? Frankly, I'm flabbergasted. I didn't change a single thing since this morning. I tried resetting my pc, but the command simply doesn't work anymore.