Ubuntu 14.04 reached end of standard support in April 2019:
https://wiki.ubuntu.com/Releases
If you would like to continue with free support then please update to a
newer Ubuntu version and tell us if the problem still occurs.
If you would like to continue with Ubuntu 14.04 then there is a
Having the same issue in 14LTS and 16LTS
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You received this bug notification because you are a member of Ubuntu
Desktop Bugs, which is subscribed to gnome-shell in Ubuntu.
https://bugs.launchpad.net/bugs/1502370
Title:
Unity does not send UnmapNotify event when window is iconified
To
See also: https://bugs.launchpad.net/unity/+bug/998073
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You received this bug notification because you are a member of Ubuntu
Desktop Bugs, which is subscribed to gnome-shell in Ubuntu.
https://bugs.launchpad.net/bugs/1502370
Title:
Unity does not send UnmapNotify event when window is
** Also affects: cinnamon (Ubuntu)
Importance: Undecided
Status: New
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You received this bug notification because you are a member of Ubuntu
Desktop Bugs, which is subscribed to gnome-shell in Ubuntu.
https://bugs.launchpad.net/bugs/1502370
Title:
Unity does not send UnmapNotify
Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: gnome-shell (Ubuntu)
Status: New => Confirmed
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You received this bug notification because you are a member of Ubuntu
Desktop Bugs, which is subscribed to gnome-shell in Ubuntu.
** Also affects: gnome-shell (Ubuntu)
Importance: Undecided
Status: New
--
You received this bug notification because you are a member of Ubuntu
Desktop Bugs, which is subscribed to gnome-shell in Ubuntu.
https://bugs.launchpad.net/bugs/1502370
Title:
Unity does not send UnmapNotify
