Player leaping forward when time is slowed?

Hi, using unreal engine 4.8.3 (university machines sadly, can’t use anything newer). I have code so that when the spacebar is held down, time is slowed for everything but the player:

However when I press spacebar whilst moving, the player leaps forward before continuing to move normally. This problem is made worse when I change the characters custom speed to be higher. Any solutions would be much appreciated.