Did you use Containers app to create lxc with setup desktop button checked? what command are you using for QXC? See @edp17 examples here - https://talk.maemo.org/showpost.php?...&postcount=198
/usr/share/harbour-containers/scripts/host/new_display.sh
https://repo.sailfishos.org/obs/home:/elros34:/sailfishapps/[your-SFOS-version]/armv7hl/