I tested with two controllers and both characters are working fine. The movement of the bow on the right character is messed up, but it can still move and jump.
Thank you for testing! Weird that it's not working for me.. did you use two of the same brand controllers? I used a Dualsense PS5 controller, and a XBOX controller. Perhaps I should use two controllers of the same brand?
I was indeed aware of the right bow character being messed up :P Gotta work on that when I've found why it's not working on my side.