Sounds like a good idea if you don’t have VPN access to your internal network. Might be an issue with UPnP.
If you’re relying on UPnP for your external connection - the manual port forward is a much more reliable, and secure method, of allowing traffic to your server. I’d use that method once you return home.
Also - PMS v1.14 you’re using (which is beta) has known issues with remote connections, so I would downgrade to the previous public build and wait to upgrade until the next public release:
