OnDestroyed event does fire off when using a reference variable to another actor that was applied at runtime

An actor has a print string that fires off when an actor that it has a reference to is destroyed. This works fine if the actor is in the scene before the game starts. However, if the referenced actor is spawned into the level and then destroyed the On Destroyed event will not fire.

1. Download attached project
2. Open attached project
3. Click play in editor
4. Notice that the blueprint string only prints once when it should have printed twice

Expected: On Destroy would fire off each time the actor referenced is destroyed
Result: The On Destroyed on fires off once for the actor that started in the level

Events from an actor reference variable do not account for changing the reference variable