My jump stops working and the only way to fix it is to rebind the button to something else, It's not my controller because the "a" button still works but it just will not function when I use it to jump. It fixed itself at some point but it also came back after that.

We have the same issue, but in cross play. First i can't jump and then my friend. It works only when we stop the game and start it over, it is very annoying.

Can someone fix this please?

Try picking up weed stem or grass plank with handy gnat then dropping the stem/plank without exiting handy gnat mode?