I am also having the problem right now in Ubuntu 14.04
I also experience a similar issue with other windows disapearing from the screens AND the launcher after I minimize them. It may be another problem not sure... I confirm it happened with Chrome and terminal windows from Remmina.
I am also having the problem right now in Ubuntu 14.04
I also experience a similar issue with other windows disapearing from the screens AND the launcher after I minimize them. It may be another problem not sure... I confirm it happened with Chrome and terminal windows from Remmina.