Setting scale to 0 in any direction breaks overlap events

When the scale of an actor is set to 0 in either X, Y or Z any overlap events will fail to trigger overlap events.

1. Open UE4Editor (Top down project)
2. Create new Blueprint based on Actor
3. Wire Event ActorBeginOverlap node to a Print String node
4. Add static mesh component
5. Set StaticMesh to CubeMesh
6. Set static mesh component to OverlapAll and enable GenerateOverlapEvents
7. Drag instance of BP into the level
8. Set the scale in the Z direction to 0
9. PIE and walk over the BP instance