Running FOP2 on FreePBX and we're seeing extensions being added back to queues after they have been removed. In the queue settings, none of the users showing up are in the static or dynamic users. In fact, I have this going on for a queue where there are no extensions listed under static or dynamic.

While FOP2 is open, I can click on the extensions and select "Remove Member" and they disappear. Then about five minutes later or so, they reappear.

FOP version 2.31.08
FreePBX: 13.0.192.16

We did a reboot of the server this past weekend and that seems to have cleared up this issue.