As mentioned earlier several times, there is a major bug: when clicking on the button to go to the next month/year, the related (input) field gets updated, even when the field is disabled.

I've just tested the commercial version (Zapatec) and it looks like the problem doesn't exist there. The related field gets only updated when clicked on a date itself, not on any other button (e.g. the button to go to the next month).

This looks like a possible solution for the bug. Is this enhancement planned to go upstream? Or will this change only be applied in the zapatec-version (or call it zapatec-fork)?