Attached Static Mesh does not stay in exact position!

Hi everyone,

Me and a few other people have been having a bug in UE4 that when something is attached i.e. a Lift/Elevator door with Glass Window/Covering, it does not stay in position and moves about after a while from saving the map or rebuilding the map/geometry!

I have tried locking it and that does not work as it still moves around and the only way I can get it to stay is disattaching it from the moving doors.

Is there any work about to this?

Reece L101