When pressing down the character infinitely moves down until a menu is opened.

Where did it happen? Game.
What happened? Anytime you press the down arrow the player character will begin moving down and you can only reset it by opening a menu and closing that menu.

What did you expect? For that to not happen
Steps to reproduce:
1. Go into the game
2. Press down
3. Watch character move down

Device and operating system:pc.
Screenshots or video: is that necessary?