UMG Textblock with no font drops FPS by ~30

FPS drops in PIE when a widget is called that has text with no font selected.

1. Open Editor (any project)
2. Create new widget
3. Create the attached image in new widget
4. Compile, save, close, open character bp
5. Call widget using these nodes:

Event begin play>Create Widget > add to viewport

6. Ensure class on Create Widget node is set to new widget and owner is player controller.
7. Compile, save, close blueprint
8. Press PIE
9. In console command (~), type stat fps.

[4.7 p8] FPS drops when text has no font in widget