I have looked at your video more closely and can now see the issue.
When the issue occurs: if you enable the treebar, does it show the same issue? Also, do you have any items set in the Window/Order dialog? If you change/delete those items, does it resolve the issue?
I have not been able to reproduce the issue so far, however the cause is very likely in the window order sort routine. It sorts windows according to a number of criteria, such as connection id, window type, alphabetically, window order dialog settings, and so on. I will need to look through it to see if I can spot any issues.
Last edited by Khaled; 20/09/14 11:25 AM.