Ok, unmarking as duplicate. Locking the screen might be a trigger, but in my case, this issue only happens sometimes.
** This bug is no longer a duplicate of bug 2002624 firefox maximize button gets hidden after the screen gets (un)locked ** Changed in: gnome-shell (Ubuntu) Status: New => Confirmed ** Package changed: gnome-shell (Ubuntu) => firefox (Ubuntu) -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to firefox in Ubuntu. https://bugs.launchpad.net/bugs/2034724 Title: minimize, maximize, close buttons in title bar become invisible Status in firefox package in Ubuntu: Confirmed Bug description: Recently when I go to minimize, maximize, or close a window (I have the minimize and maximize buttons enabled in Tweaks) I discover that the buttons are invisible. I know they're there, just invisible, because I can click where they should be visible and the expected thing happens. If I quit and restart the application in question the buttons become visible again. This only affects some windows (usually just one) at any given time, not all of my windows. See attached screenshots for an example of what I'm talking about. ProblemType: Bug DistroRelease: Ubuntu 23.10 Package: gnome-shell 45~beta.1-0ubuntu2 ProcVersionSignature: Ubuntu 6.3.0-7.7-generic 6.3.5 Uname: Linux 6.3.0-7-generic x86_64 NonfreeKernelModules: nvidia_modeset nvidia ApportVersion: 2.27.0-0ubuntu2 Architecture: amd64 CasperMD5CheckResult: unknown CurrentDesktop: ubuntu:GNOME Date: Thu Sep 7 11:37:40 2023 DisplayManager: gdm3 InstallationDate: Installed on 2019-01-02 (1709 days ago) InstallationMedia: Ubuntu 18.10 "Cosmic Cuttlefish" - Release amd64 (20181017.3) RelatedPackageVersions: mutter-common 45~beta.1-1ubuntu2 SourcePackage: gnome-shell UpgradeStatus: Upgraded to mantic on 2023-05-20 (110 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/2034724/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp