Modal dialogs are meant to move the parent window. If you want to turn that feature off then install 'gnome-tweaks' and set:
Tweaks > Windows > Attach Modal Dialogs = OFF If you have any other issues then please report them in separate bugs by running: ubuntu-bug gnome-shell ** Changed in: gnome-shell (Ubuntu) Status: New => Invalid -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1882399 Title: Window placements To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1882399/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs