Yes, that’s another server (Cronos). I’m working on fixing that one as well.
But the server that I experienced this bug on is “the Ark” ignore “Cronos” for this bug thread.
on “the Ark”, I followed the docs for parity swap to add a larger new parity drive, and move the old parity drive to replace another failing drive.
https://docs.unraid.net/legacy/FAQ/parity-swap-procedure/
After a ~48 hour "copy" process, I watched the copy process go from 98 to 100%. Then a couple minutes later the array updated to show "Stopped. Upgrading disk/swapping parity" which is expected according to the document.
However, it does not show the "START" button. Instead, it is still presenting the "COPY" button with copy information/checkbox. (See screenshot above)