Have you had any luck on figuring out your issue? I finally decided to upgrade to 7.0 today. I lost all external access to my Plex, Nextcloud, & Overseer. nextcloud can't connect to the mariadb any more either. all this was working this morning. all I did was update each docker first this morning with there local updates, then did the 7.0 update. seem like a network issue that has been introduced. not sure what to do next.