Hi Olivier, Can you please file this bug upstream, for either GNOME Shell or Qt?
I have experienced a similar issue a couple of years ago with X11 (https://bugzilla.gnome.org/show_bug.cgi?id=736719), however yours seems to be a different one. ** Bug watch added: GNOME Bug Tracker #736719 https://bugzilla.gnome.org/show_bug.cgi?id=736719 -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to qtbase-opensource-src in Ubuntu. https://bugs.launchpad.net/bugs/1678385 Title: qt5 application wrong popup position on wayland native Status in qtbase-opensource-src package in Ubuntu: New Bug description: 1- log in using gnome wayland session 2-set environment variable export QT_QPA_PLATFORM=wayland-egl or use switch -platform wayland for qt app 3- start a qt application for ex: "qtcreator -platform wayland" 4- click on menu or make a contextual menu to appear. => They appear on left edge of screen not where they should on the application To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/qtbase-opensource-src/+bug/1678385/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp

