UE4 mobile movement breaks after pausing

hi, so I use UE4.25 and I’m making a mobile game.
Currently, I am noticing a bug where after handling pausing and unpausing the game, the input stick on screen goes dark and stops working alltogether.

does anyone know how to fix this? It’s completely viable that I’ve messed something up in the code, but I can’t see it.

thanks in advance.