Actor Enable Collision does not affect ISM

The problem was reported via UE Bug Submission. I was able to repro with their provided test project.

1. Download Attached Test Project
   1. Alternatively, create a blank bp project
   2. Create Actor blueprint with InstancedStaticMesh component (i.e. a cube instance inside)
   3. Open BP and Set "SetActorEnableCollision" to false on BeginPlay
2. Play in Editor
3. Attempt to fly through BP_Actor Cube

Result: BP_Actor cube has collision

Expected: BP_Actor cube does not have collision