Deleted/cancelled event from a series of events is still shown
I'm using a Nextcloud calendar for my events (gnome-online-accounts integration into gnome-calendar (3.34.2) and webDAV sync to my smartphone, using Etar as an Android-App). Part of this calendar is an event which recurs each week. Sometimes I delete/cancel one of the events of the series, as I can't attend the event as of this week. If I delete the event using Etar on my smartphone, the event is marked as cancelled in my Nextcloud and Etar hides the event inside the app. In contrast in Gonme Calendar the event is not marked as cancelled nor is it deleted (both would be fine for me). I'm regularly confused seeing the event normally scheduled in gonme-calendar, but not on my smartphone.
What I actually expected: The cancelled event is either not shown anymore (e.g. deleted) or marked as cancelled (e.g. crossed out).