gnome-calendar shows all events multiple times in week-view and in sidebar-preview on the left
I have an issue with the gnome-calendar. When I open it after boot, everything is just fine.
Then I close it and open it again: all events in week-view and in preview in sidebar on the left are shown twice.
Then I close it and open it again: all events in week-view and in preview in sidebar on the left are shown three times.
Then I close it and open it again: all events in week-view and in preview in sidebar on the left are shown four times.
And so forth....
In month view everything is just fine. This does only affect week view and the sidebar.