Happens for me on Ubuntu MATE 18.04 LTS with Chromium from Ubuntu repositories while using Chromium's own window decorations (with *Use system title bar and decorations* unchecked).
** Tags added: bionic ** Also affects: marco (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to gtk+3.0 in Ubuntu. https://bugs.launchpad.net/bugs/1854383 Title: Extra window decorations are created on windows with client-side decorations. Status in Ubuntu MATE: Confirmed Status in gtk+3.0 package in Ubuntu: Confirmed Status in marco package in Ubuntu: New Bug description: Steps to reproduce after a minimal/full install of Ubuntu MATE: 1. Start up a Gtk3 application with a header bar (tested with Gnome Software) or a browser (such as Firefox) without using a standard window title bar that saves the position and size of the window before it was closed. 2. Maximize the application window, then close it without changing the window size 3. Relaunch the application and resize/unmaximize it After this, dummy window decorations will be created around the window. This issue has been tested on a Dell XPS 9570 and using Gnome Boxes 3.34. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-mate/+bug/1854383/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp