Pawn Sensing - on vision lost

For anyone like me that still is looking for this solution. I did not solve it but I have a work around.

The blueprint I am using is a turret enemy. Once it sees you it follows you and fires. But I also wanted it to go back to it’s original rotation. Once it stops seeing you it resets.

There is a cone shaped area of which the PawnSensing is using as it’s trigger area. What I did was I added a cone mesh to the blueprint in the same shape as that area of sight. I sized it the best I could. It is slightly off but whatever. I set it’s collision to overlap all and set the material to invisible. Which is just a material with the opacity set to zero. Now I have something in the blueprint with a begin and end overlap events.

The work around works for now but I would like to know if there is a proper way to do this. I really don’t want to have to keep throwing in extra shapes just to use as trigger boxes.