Same thing. Tried shutting down and restarting computer and trying again. Since this happened to someone else at same time, guessing this is in fact a server problem.

Seems that WP already can calculate if a space has full rail supply. It would be a "9" on the supply map. A port would only have to check for other ports on the same sea/ocean that were "9" supply. So it seems to me anyway.

You could also end port supply if there is no merchant shipping available ...

As a fellow game designer (Der Weltkrieg series - WW1 boardgames) I applaud your efforts. This is a good game, there are just some minor issues, so I understand.

But rather than having to check everything, the port should stop being a supply source if it has no connections to a supply source ...

I have even been able to use German shipping in the Med while Italy is still neutral. I think that German shipping should never be allowed in the Med, unless, say, they (or their allies) control Gibraltar and France (at a minimum).

I can see Germans using amphib capability in the Med, as you could ...

Just to show, the Germans have no supply going to Med. Here is north of Italy. France never fell, so Toulon shows French control.

The issue is that the ports have no "source" of supply. There is nothing being sent to them. At this point Allied and Russian units are all over Germany. The units in Italy were isolated and bypassed months earlier.

The fix would be that there is no supply at a port if it is not connected by a ...

The German units seem to be drawing full supply for months by only controlling Crotone and Civitavechia. The control no other ports in the Med. And haven't for months.

I think this is a major bug.

Or am I missing something?