An Actor Reference will reset to a None when referencing a ChildActor

A blueprint with an Actor Reference will reset to a None value on compile or stopping PIE

User Description:

We have come across a bug with the editor regarding setting direct references to child actor components. A direct reference to a child actor component will nullify after the first run of game mode after loading such a level setup from file.

1. Open the attached project
2. In the World Outliner, select the Test blueprint actor
3, In the Details panel, make sure that Default > Actor Reference is set to "Test###"
4. In the Content Browser, open the Test bp
5. Compile the bp (or skip opening the Test bp, and Play the level and then Stop)

Results: The Actor reference variable for the Test actor instance in the level will be reset to a None value on compile (or on Play then Stop)

Expected: For the variable to maintain its set value