No Bind option for brush array delegate in UMG

The option to bind to a delegate does not appear when the desired property is in an array.

1. Open UE4 Editor (any project)
2. Add code to project based on Button (MyButton)
3. Make the following edits to MyButton.h
   • Replace #include "Components/Button.h" with #include "UMG.h"
   • Add to class declaration

     public:
     UPROPERTY(EditAnywhere, BlueprintReadOnly, Category = Appearance)
     FSlateBrush MyNewBrush;
     
     UPROPERTY()
     FGetSlateBrush MyNewBrushDelegate;
     
     UPROPERTY(EditAnywhere, BlueprintReadWrite, Category = Test)
     TArray<FSlateBrush> MyBrushArray;
     
     UPROPERTY()
     FGetSlateBrush MyBrushArrayDelegate;
     

4. Compile
5. In the editor, add new Widget Blueprint (MyWidget)
6. In Palette view, add My Button to the Designer
7. With MyButton selected, search for "Brush" in details panel
8. Add element to My Brush Array

Result:
My New Brush has the Bind dropdown option but the new element of the My Brush Array does not

Expected:
Each element of the array has the Bind dropdown

Cannot bind property of array element in Editor