I can confirm that https://gitlab.gnome.org/GNOME/gtk/-/merge_requests/8459 fixes the issue for me
-- You received this bug notification because you are a member of Desktop Packages, which is subscribed to mutter in Ubuntu. https://bugs.launchpad.net/bugs/2107245 Title: Resizing XWayland & X11 windows is extremely slow Status in GTK+: Fix Released Status in Mutter: New Status in gtk4 package in Ubuntu: Triaged Status in mutter package in Ubuntu: Opinion Status in gtk4 source package in Plucky: Triaged Status in mutter source package in Plucky: Opinion Status in gtk4 source package in Questing: Triaged Status in mutter source package in Questing: Opinion Bug description: When resizing windows that are XWayland (Discord, Spotify, etc) the resize does not take effect until seconds after holding the resize. If you let go of the resize before it happens then window does not resize at all. Ubuntu 25.04 Beta NVIDIA RTX 5090 (570.133.07) To manage notifications about this bug go to: https://bugs.launchpad.net/gtk/+bug/2107245/+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