I believe this is a bug that is specific to board views with multiple groups applied, but I am not completely sure that it’s not present elsewhere. I am grouping by a single-select field first, then by assignee (to simulate a classic kanban). When I group only by the field, my columns appear as expected (all options + no value when showing empty groups, only columns with a card present when hiding empty groups).
As soon as I introduce the assignee sub-group, the first group (columns) show all field values, including those that were deleted/deactivated. I confirmed that none of the tasks on the board have any inactive values selected (I could see why you might want to present inactive columns with a card present, when that occurs).
This only seems to happen when the single-select field is the first of the two groups (i.e., the columns).
I have custom fields (e.g. Status) where I have changed the options over time. They do not show up when I go to edit the field, but the old options show up in the Board view. No tasks (complete or incomplete) are tied to these old options.
Interestingly, the removed option only shows up when the Board is grouped by a subgroup (e.g. Assignee, or Due Date).
How can I get these old options not to appear on the Board view when subgrouping?
