I work with a completely regular filter on issues in my project. The sorting is "ascending in rank".
Problem:
I cannot change the rank by drag and drop.
The rank does not update. The rank value remains unchanged. See (3)




(4) After browser refresh (F5), the issue holds on same position (rank).
And if I change the rank via the context menu (...) with the command "Rank up" or "Rank down", the issue is not changed by one rank up or down, but all the way up or all the way down.
I have already taken into account the information from other posts like "How to sort epic by rank and the child issues by title?" and "rank and priority sorting".
The sorting is (only) "ascending rank".
What's wrong?
P.S .: I use Jira Server (v8.4.2 # 804003-sha1: d21414f)