Joystick stuck

Hey there — have you changed any of the virtual stick settings in the Gameplay menu? Clearing your phone’s cache can also help with similar issues.

Try to pause the game and then continue

Good idea. Also, make sure you’re not minimising the game using the Home button and then jumping back in after a while — try fully closing it and reopening instead.

My joystick is not working well I may be moving it to one direction and it will just stop moving 

Could you also try the steps listed in this thread and see if that helps?