We use a confluence team calendar on order to organize our teams' on-call-duties.

Now, we do see duplicate entries in this calendar-subscription on iPhones or Macs - probably due to calendar entries using a repetition interval.

Here's an example:

In week 29 user "Mario Kröger" is on duty, as correctly displayed in confluence teamcalender (see screenshot "Confluence-calender MK.png").
Looking at the calender-subscription on my iPhone, I can see that both "Mario Kröger" AND "Alexander Dransfeld" are on duty (see screenshot "iPhone Calender AD MK.png").

We suppose that the reason is that Alex Dransfeld's entry uses a repetition-interval (every 5 weeks - see screenshot "repetition interval AD.png").
Actaully Mario and Alexender switched their on-duty-shifts and the calendar entries have been "corrected"/deleted manually.

Nonetheless does the subscription still show the "old" entry of Alex' shift, though the confluence-gui shows the correct entries...