I have the exact same problem, about 50 hours in. Enemies wont move (or allied non companion NPCs) or use any actions. Camera moves to them, waits for 10+ seconds then moves to the next person. Makes fights insanely easy but so boring. Have also tried reloading game and reloading pc to no avail. Happened randomly as well with no warning sign and is happening on all future combat encounters. One thing I found was that if my main custom character dies (properly dies, cant be helped up but needs a revive scroll) then everything goes back to normal. But it only stays normal for as long as my character is dead. The moment he is revived the bug starts again. Have sent a bug report with saves to Larian.
