This bug appears to be new, and it’s related to the PlayerModule system.
If you keep switching control modes from the main menu, the jump button keeps getting re-created instead of reusing the button that already exists.
(cc @AllYourBlox)
This also breaks things when devs hook into the JumpButton itself - because it’s covered by the clones and won’t fire.
I think this can be fixed by doing this
This has been fixed.