We had some problems with dates. The task is configured to repeat every year, for example birthday. When we put a note that the task is completed, the date is automatically changed to a completely different date, and not next year! In this regard, we have a complete failure of the calendar.
please tell me - what exact date format have you used?
The proper format that can be used to set a recurring task to one particular day once a year should be (for a birthday on June, 10th, for example):
every 10 jun