This feels like a bug because it is totally confusing as a user that you can’t add rows when applying multiple groupings. You simply don’t get the + icon on the last row.
I eventually figured out that I had to get rid of the other level of grouping s...
Thanks for the prompt response. You’re right, I was grouping based on a
lookup field and had ignored the warning. However, since this is simply a
lookup from the other grouping field (i.e. group by project category
(lookup from project), then by proj...
