Possible fix:
On SudokuFrame initialization: call initialize(true)
On Variant select/deselect: call initialize(false)
Modify initialize() with true/false argument
Thanks. Well spotted. Problem fixed using your suggestion. It would have also happened on select/deselect of New Rating scheme and SE121 mode from the option menu. All now fixed and repository updated
Possible fix: On SudokuFrame initialization: call initialize(true) On Variant select/deselect: call initialize(false) Modify initialize() with true/false argument