Fortnite sprint bug?

I've had a bug since Season 7 where I often stop sprinting and instead walk slowly. Or sometimes my character runs in the game against something invisible and thus stops short. If you run over it again there's nothing there. I've already reinstalled my game, sprinted by default, cleaned up my controller or left stick, I've tried other games to see if the bug is just in Fortnite (he was) and I unbinded the sprint button. All solutions that I found online, I have tried and nothing helps. If anyone has another idea, I would be very grateful.

I recommend you to activate "Auto-Sprint". If you have further problems, contact a moderator of the Fortnite Germany Discords.