Property window doesn't not propagate changes consistently with WithIdenticalViaEquality

1. Download and unzip attached project.
2. Run editor.
3. Select actor.
4. Select BP_MyComponent in Outliner.
5. Change "Some String" to any value. Observe that value resets to the default.
6. Change "Category" to any value. Observe that the value does change.
7. Go back and change "Some String" again. Observe that it does change now.

Expected behavior: all fields should change without any reset.