I tried the deluge plugin with the same results and have to use the earlier version. I too am on airvpn so I checked with a friend on pia and he has no problems. I disabled ipv6 on my router and the problem goes away and the latest version works. I will try those commands when I get home and see what happens.
I updated an hour ago to the latest qbittorrent and couldn't get to the webui. The log just kept repeating could not resolve www.google.com. I changed the repo to the previous version and all is back to normal. Is there something I need to change for the lastest version to work?
I'm having problems with nextcloud as well. It was working fine until I updated it and now I just get bad gateway. I also can't install any new dockers as they wont run and the apps page takes forever to load.