Why do controls only work for one player in local multiplayer?

Hi . Was this expected to be fixed in 4.6? I’ve made a copy of my project in 4.6 and the problem only seems to have gotten worse. Now, the 4 characters spawn, player 0 remains in the air in his idle animation, players 1-3 fall to the ground, but none of them respond to the controller input anymore. Any thoughts?