sort order Enrolled users list changes after adding or removing user

1) Go to the Users > Enrolled users screen

2) Sort the list on Last access to course and note which user is at the top of the list, the one that was in the course most recently (you, most likely) or one that visited the course very long ago or never

3) Remove a user from the list by clicking on the X at the end of the line and click on Unenroll when asked for a confirmation

4) The list will now be sorted the other way around: if the most recent user was on top before, he or she will now be at the bottom of the list, or vice versa

5) Remove another user from the list: the list will flip again and go back to its original sort order. Every time a user is removed, the sort order changes from Up to Down or back.

6) This also happens when sorting on Surname, ID number or Email address, and when adding new users with the Enrol users button, so it looks like the current sort order flips whenever a change is made to the list (adding or removing users). Changing roles for a user in the list (with the pencil) does not change the sort order.