Strang Split screen collision issue.

So, Im making a little split screen game where you hit each other with hammer. When a player is hit they ragdoll. This works fine, If i jump into the other players hammer I ragdoll. But when player 1 swings their hammer it just pushes the other player out of the way and doesn’t register a hit, UNLESS there is no where else for player 2 to go (ie they are against a wall.) I have no clue why this happens, please and thank you for your help!