When I use Shift+Ctrl+Z combination in MaskedTextInput, corrupted symbols appeared in the field. I know that Ctrl+Y combination use as the forward command. But in another program (Photoshop) I use Ctrl+Z and then Ctrl+Shift+Z combinations, and sometimes I use it habitually in MaskedTextInput and see corrupted symbols. (Many people can also use it habitually). When i use it nothing should happen or should be a step back.