It doesn't seem to be possible to clear the value of a KendoReact MaskedTextBox. This can be seen here: https://stackblitz.com/edit/react-xnkrec?file=app/main.jsx
Once you have set a value, it isn't possible to clear it. Deleting everything in the input sets the value to the full mask. This is different behaviour to the jQuery MaskedTextBox which clears the value if the raw value is empty.
Is this intended behaviour?