Nativized UMG assets not visible

Widgets appear and function fine in regular PIE. This may be a result of recent changes to widgets in Dev-Editor. Will regress upon request.

1. Open UE4Editor.exe QAGame.
2. Edit > Project Settings > Packaging:
3. Make writeable if necessary
4. Disable Use Pak File
5. Expand advanced arrow under "Packaging" header
6. Add TM-UMG to "List of Maps to include in a packaged build"
7. Still in packaging settings, under "Experimental", enable "Nativize Blueprint Assets"
8. Then package by navigating to File > Package > Win64 (Development)
9. Open the resulting package's directory and open the packaged game by double clicking on the .exe
10. Hit ~ and type: open TM-UMG, then hit enter

Result:
Map opens and no UMG widgets are displayed on the screen

Expected Result:
UMG widgets are on the screen and some are intractable.