Struct array of type 'key' dirties blueprint each time it is re-opened

Struct array of type 'key' dirties blueprint each time it is re-opened.

Regression (no) issue (does) occur in 4.11.2

1. Open Editor (any project)
2. Create new blueprint (actor)
3. Add new Variable (key array)
4. Create a get variable node of key array
5. Compile, save, close blueprint
6. Save, close, re-open project
7. Re-open blueprint

Results

Blueprint is marked as dirty/needing compilation.

Expected

Blueprint is not marked as dirty/needing compilation.