As of August 27th, 2021, the user filter list on any Agile board is a limited in some way. I have 12 users with tickets assigned in the current sprint (tickets show on this board), but the user filter only contains 5 users, plus the Unassigned "user". One of those 5 users is myself, of which I have no tickets assigned in this sprint.
It seems like the spillover "more" list has been lost. Has anyone else experienced this or know if this is a known bug?