Sorting within groups not working

I have a query with grouping. I'd like to sort first by group, then by the item within the groups.

This seems to not be working. It sorts by the first field, but not the second.

Here's the query:

Here's the grouping:

The groups are sorted, but not within them:

Here's it is without groups, working fine:

Rlomansky,
Yes, this is a bug and here is a fix:
Tip/fix: Query grouping + Sorting>

I do hope support will fix this though HINT HINT Vlad 😃.