network-manager-gnome autostarts its own systray icon from /etc/xdg/autostart, which duplicates the network genmon (plugin-13) already in the panel. Override it with a Hidden=true user-level .desktop, the same way blueman-applet and nm-tray are already handled, and copy it into place from the panel installer. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>