More often than not (95%) When i am playing split screen, Player 1s screen freezes on the customization menu when P2 opens the menu soon after and both are choosing mutators at the same time, sometimes P1s controls leak into P2s and is able to control their screen whilst on this menu.
Another bug I found is when P1 is ragdolled it is able to back out of P2s customization menu when they open it.