I play with an Xbox Controller on PC. I currently have 2 bugs that I can't fix…
Since Chapter 2 I have the bug that when I go into my inventory my cursor is always short on the middle slot and then goes straight to the first one. Bothers me if I want to quickly sort my weapons and wait until this bug is over.
Since Chapter 2, sometimes my character changes two weapons instead of one at the push of a button. I just want to know if it's on my controller or on the game.
Fortunately, it's up to Fortnite, your PC and the controller. Eventually, the controller is not as compatible with your PC as another, and if your PC can't read the controller properly, Fortnite can't.