Default Value elements in a variable array inside a Game Instance Blueprint collapses after anything is entered

Default Value elements in a variable array inside a Game Instance Blueprint collapses after anything is entered. This does not occur in other Blueprint classes.

Additional actions that will collapse the variable's elements is clicking off the variable field, adding a new element, and compiling.

Reproduced in 4.7.6, 4.8.2 and Main (//depot/UE4/Promotable-CL-2623091)

1. Open any project
2. Create a new Game Instance Blueprint
3. Create a new array variable of type String
4. Compile
5. Click the + to add an element
6. Type something in the text field
7. Hit Enter

Result:
The variable elements collapses.