I created a calendar, based on a report that pulls data from 29 sheets. The report looks fine. The calendar app calendar has a Group Data By (there are 3 "Steering committee") and a Secondary Grouping (there are about 30 "workstreams"). All looked great yesterday, but today my calendar is missing the data for one group. It displays the group name, but not the secondary group name and no calendar entries. If I change the calendar settings to have Group By "workstream", I see everything (although ugly colors probably because there are SO many. If I change the calendar to group by Steering Committee, I see all 3 areas. However, if I use both groupings, many do not show at all. I am the owner of all the workspaces containing the sheets, and the owner of the report and created the calendar.