Prevent Y Axis movement of 3rd Person CameraBoom

I have setup the 3rd person template to auto run on the x axis and locked the camera rotation behind the player in a simple endless runner type game. How can I prevent the camera from following the player character in the y axis? I tried getting the world location of the CameraBoom and setting the the new world location with the y component zeroed on event tick. This locks the Camera’s Y movement but when I move the player left and right the Camera has some odd movements in the x axis…like away and towards the player seemingly based on the rotation of the character.