Unexpected behavior in combination with plank and 1 or more panels

[APolihron]

 OS: Ubuntu 17.04 daily
Interface : Mate 1.17.2

[Test Case]
Control Center-> Mate Tweak-> Panel-> Select Copertino Layout-> Enable Indicators from Panel Feature
Add another panel to the interface-> Right click on the new panel ->Properties-> Now you can minimize all the panels from the plank icon =))

Workaround it is to change the Windows manager(because the change will close "Panel Properties" tab
The problem is in all the windows managers
Compiz -> the panels will not minimize but the icon will not go away
In Marco (no coompositor), (software compositor) and (Compton gpu compositor) the bug is like you see in the video
https://www.youtube.com/watch?v=9p_0-mvcKoU

[APolihron (apolitech)]

OS: Ubuntu 16.04.2
Interface : Mate 1.12.1 (default) and Mate 1.16.1 (ppa)

[Test Case]
Control Center-> Mate Tweak-> Panel-> Select Copertino Layout
Right click on the new panel ->Properties-> Now you can minimize the panel from the plank icon
                                     or
Add another panel to the interface-> Right click on the new panel ->Properties-> Now you can minimize all the panels from the plank icon =))

Video
https://www.youtube.com/watch?v=1KidAdYzhbE

[Martin Wimpress  (flexiondotorg)]

Please also raise the issue upstream:

  * http://github.com/mate-desktop/mate-panel

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[APolihron (apolitech)]

This problem it's in 18.04 daily

[Stefano Bagnatica (thepisu)]

Also see this post on Fedora questions:
https://ask.fedoraproject.org/en/question/102314/removing-mate-panel-dock-icon-from-plank/

[Pavel Petukhov (pelvur)]

I have the same issue on Debian 10.3 with MATE.
Strangely enough, I have another laptop with the same setup, and I have never seen it there, I didn't even know this issue exists. Not sure if any of the apps I have installed make the difference (I don't have the above mentioned libremenu installed, i don't even see it in repos).

Btw, there is another duplicate bug #1733078

[Launchpad Janitor (janitor)]

[Expired for mate-panel (Ubuntu) because there has been no activity for 60 days.]

[Launchpad Janitor (janitor)]

[Expired for Ubuntu MATE because there has been no activity for 60 days.]

[Launchpad Janitor (janitor)]

[Expired for plank (Ubuntu) because there has been no activity for 60 days.]