If I filter on certain tags, then go to Sort by Tag, it should sort the tags I filtered, not show and sort all tags.
That's what a filter is for.
Hi @Walter_Kawecki The group and filter function are two separated function. The filter function is to filter out the tasks, not the groups shown in the list.
Take my project below for example, I filter by tags (contains the tags 'budget' and 'implement') and at the same time, I grouped my list by tags.

Since the task "Web design" also has the tag 'outsourced'; the tag group for outsourced will appeared in the list as well.

Nonetheless, I will let our team know about your feedback.
Peggy, Apr 8, 2021
If I filter on tags, then sort by tags, it should only sort the tags I filtered. That is implied by the UX
WJK, Apr 2, 2021
Hi @Walter_Kawecki Do you mean you Filtered by certain tags, then 'Grouped by' Tags? Because we don't have a Sort option for tags. Could you please kindly attach some screenshots for us so we can have a visual understanding of the issue you are encountering? Thank you for your help!
Peggy, Mar 31, 2021
My point was about sorting after you filer. If you cannot sort after filtering, then it shouldn't appear at that you can. Also, Filter->Sort is basic stuff.
WJK, Apr 14, 2021
The problem that I'm having with this software is that it seems intuitive, but it is not, which adds unnecessary cognitive costs and frustration. If it seems like you should be able to do some, based on what the UI looks like, then you should be able to do it.
WJK, Apr 14, 2021