I don’t notice that. It works as expected.
Okay so this seems to be the issue and sounds like the Live Coding issue, please see the lecture on it in Obstacle Assault. Personally, I suggest you disable it. If you do please close Unreal and rebuild the project by deleting the Binaries and Intermediate folders then re-open the project.
Just to point out again, it shouldn’t have a grabber, only the player.