Accessing Plex via tailscale network as redundancy to Traefik access

[Scales82]

Hi.
Im trying to access my plex instance over a tailscale network, I've set it up as per the git here. And for the most part, it works fantastic no matter where I am in the world BUT. some wifi networks Ive been connected to blocks my plex instance (but not others for some reason). Ive recently been dabbling in tailscale and am very impressed in its ability to connect to my home network and use it for exit nodes and other connectivity.

I've been trying to access my plex instance (from device apps particularly) via this connection. When I type in my tailscale ip and plex port, it connects fine. But when I use the app, its a no-go.

I've asked on the tailscale groups etc. But I get the feeling the connectivity problem is due to my instance being behind a traefik reverse proxy and/or the way plexms is configured using the compose files in this git.

Does anyone have any ideas I can try to get this working as a redundancy?