That's an Ubuntu feature designed to match the position of text in the titlebar of maximized windows. It's not a bug but I understand some people don't like it (occasionally including me). It doesn't happen if you use the GNOME dock instead (if you disable Ubuntu Dock in the Extensions app).
** Package changed: xorg (Ubuntu) => gnome-shell-extension-ubuntu-dock (Ubuntu) ** Changed in: gnome-shell-extension-ubuntu-dock (Ubuntu) Status: New => Won't Fix -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/1884392 Title: Clock does not remain in center when auto-hide the dock setting is disabled from gnome settings To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell-extension-ubuntu-dock/+bug/1884392/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp