Im not sure if that would work as Ive never used a gate node before… Im still new to blueprints as i’ve only recently transitioned to UE4 from UDK3 … A friend of mine is having the same issue, where his action (lasers) can kill the player, but when the player re-spawns at the checkpoint before the lasers, there is no way of resetting the blueprint in which the lasers are contained (or at least we haven’t found a way) so the lasers are still active… a few of us have tried and not succeeded, we are all artists as well so hopefully my questions will be a bit more forgiving 
… In its basic form, if you die in a trap and you get re-spawned to a checkpoint, we need the trap to be active as if the level has just started again, but from the checkpoint, so the player cant just walk straight past the trap on the second try 