Connect character with the Pawn

No clue but you’re doing something very strange with the array remove… you nullify the reference, make it into an array and then remove nothing from it. Those nodes do nothing - what is it supposed to do?

why is the connection with the Pawn
interrupted after 5 seconds

If the issue is time based, it’s not here - not in the screenshot. But calling End Overlap would sever the execution chain for the Add Movement Input - so something calls that.