Widget components set as IsVariable have non-functional settings/variables

There is an issue occurring where Widget components set as IsVariable have non-functional settings/variables. This issue occurs with multiple widget components. This does not appear to be a regression.

Versions Tested: Issue occurs in all versions Tested
4.18.3 CL - 3832480
4.19p4 CL - 3873914
4.20.0 CL - 3879785

1. Create a new project (No template or starter content needed)
2. Create a new Widget Blueprint > Name it "TestBP" > Open TestBP
3. Add a Text Block to the canvas panel > In the details panel check the IsVariable Box
4. Navigate to the event graph and select the Text Block variable
5. In the details panel check the "Expose on Spawn" checkbox
   Result: The event graph and details panel flashes and the box does not check
   Expected Result: The box checks without issue