Adding variables to a struct clears struct arrays used in blueprints

Adding variables to a struct clears struct arrays used in blueprints.

Regression (yes) issue (does not) occur in 4.12.5

1. Open Editor (any project)
2. Create new struct
3. Add any variable to struct (save)
4. Create new blueprint
5. Add variable array of type (created struct)
6. Compile
7. Set at least 1 array element in details pane, set values in struct variables to any other value.
8. In Struct, add a new variable (any)
9. Save
10. In created blueprint, open elements dropdown in details pane of struct array

Results

Any altered values set back to default values (see attached .gif)

Expected

Altered values remain altered, new variable added.

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