BP structures added as local variables do not retain default values

Adding a BP structure as a local variable to a function in a UMG widget
graph will display the correct default values in the editor, but zero out
to per-element defaults at run time.

Update:

Other users are experiencing this with local variables in standard blueprints and not just UMG. I will comment with updated repro steps.

1. Create BP Struct. Name it TestStruct
2. Open the struct and change MemberVar_0's tpye to string and put "Test" as default value, save.
3. Create a Blueprint class based on Actor and open it
4. Create a new function and add a new TestStruct local variable
5. From the functions exec add a print string node
6. Drag a get node for the Struct variable and create a break node
7. Connect the string variable from the struct to the print string
8. In the event graph add a BeginPlay node and connect a call to the function created
9. Compile and reopen TestStruct
10. Change the default value of the string from "Test" to "NewTest"
11. Save and PIE.

Result: "Test" prints Expected: "NewTest"