Splines

I have this problem with a spline: I have Point A and Point B. I want my character to perform an attack from the fist, so I created the spline with Point A at the fist and Point B at a certain distance or at the enemy’s distance.

I have an actor with the spline, and I’m using a timeline where Point B moves from its initial position to a specific position.

But the problem I have is that when I jump, multiple splines appear. There’s no Event Tick; I only activate it when I press a key on the keyboard.
Screenshot 2024-07-28 221419