I worked out that it happens to a window depending on its position in a dual-monitor setup - attached is a video demonstrating the problem.
** Attachment added: "Window controls dissapearing.mp4" https://bugs.launchpad.net/ubuntu/+source/unity/+bug/1383060/+attachment/4292094/+files/Window%20controls%20dissapearing.mp4 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1383060 Title: Window controls became invisible To manage notifications about this bug go to: https://bugs.launchpad.net/unity/+bug/1383060/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
