Sounds like this might not be a gnome-shell bug. Can you use xwininfo or xwininfo -all to get more information about the window?
-- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-shell in Ubuntu. https://bugs.launchpad.net/bugs/1820230 Title: spotify (snap) starts in fullscreen without windows decorations Status in gnome-shell package in Ubuntu: New Bug description: Ubuntu Disco up to date spotify 1.1.0.237.g378f6f25-11 session: Ubuntu on Xorg 1 display screen #0: dimensions: 1920x1080 pixels (508x285 millimeters) resolution: 96x96 dots per inch When spotify is closed in fullscreen mode, on next start it starts like a fullscreen app without any window decoration. There is then no way to control the app. window. The following message is displayed in the logs mars 15 10:45:06 sark org.gnome.Shell.desktop[4668]: Window manager warning: Treating resize request of legacy application 0x4200001 as a fullscreen request Test Case: 1. Start Spotify 2. Switch to fullscreen (arrows on the bottom right corner) 3. Close Spotify with ALT+F4 4. Open Spotify again Actual Result The apps launches in fullscreen without any windows control and no way to switch to normal mode. Workaround click on the arrow to switch to fullscreen then again to switch to normal mode. ProblemType: Bug DistroRelease: Ubuntu 19.04 Package: gnome-shell 3.32.0-1ubuntu1 ProcVersionSignature: Ubuntu 4.19.0-13.14-generic 4.19.20 Uname: Linux 4.19.0-13-generic x86_64 NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair ApportVersion: 2.20.10-0ubuntu23 Architecture: amd64 CurrentDesktop: ubuntu:GNOME Date: Fri Mar 15 10:38:59 2019 DisplayManager: gdm3 InstallationDate: Installed on 2014-07-15 (1704 days ago) InstallationMedia: Ubuntu 14.10 "Utopic Unicorn" - Alpha amd64 (20140520) SourcePackage: gnome-shell UpgradeStatus: Upgraded to disco on 2018-03-24 (355 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1820230/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp

