I see.
I would not use an event tick, personally, as for larger projects, it can become quite taxing.
Anyway, I’m unfamiliar with the correct usage of this function (at the moment) so I can’t point any errors out. Maybe someone else can.
I would monitor the rotation values with PRINT STRINGS, as you mention that this always comes out false.
It’s possible that your Mesh is not aligned with the Camera and/or its Capsule. As you are getting the ACTOR ROTATION and not necessarily the rotation of the Mesh.