Get All Actors of Class is failing to report at Event Begin Play in a streamed level

Get All Actors of Class is failing to report at Event Begin Play in a streamed level.

Test project attached.

This is a regression: did NOT occur in 4.8.3. Reproduced in 4.9.0 binary and Main (2678421)

1. Open a new blank project
2. Save the level as PersistentLevel
3. Open the Levels window
4. Levels > Create New
5. Save the new level as StreamedLevel
6. Create an Actor Blueprint
7. Add the following:
[Image Removed]
8. Drop the Actor BP into StreamedLevel
9. In PersistentLevel Level BP, Event Begin Play > Load Stream Level (StreamedLevel)
10. PIE

Result:
Print String returns 0 and then 1 after the 0.2 delay.

Expected:
Print String returns 1 immediately on Begin Play