When in the sewers floor, EVERYTIME there's a fly nest, the performance drops so much the Game start going super slow motion and super lagy. Its so bad I cannot even short most of the time with the wand. This also happens playing multiplayer.
This also happens in the final fly boss. The big fly moved super fast and stop, like It was clearly lagging. It is very bad.
Also this has also happened in the last alternative floors (the one with cristals) when there's too many enemies and It makes the Game pretty hard to play.