After clearing the options of a ComboBox (String) widget it will not update

If a user uses clear options on a combo box (String) and then tries to add new and different data, the data that is added was the data that was removed with the clear options node.

1. Open Attached project
2. Click play
3. Press Button A
4. Click Combo box (String) Says A,B,C
5. Click Button B
6. Click Combo box (String)
7. Notice it still says A, B, C when it should say 1, 2, 3

"Combo Box String" can not change added options again