Trade, especially with other nations, does not seem to "re-route". For example, the Mughals lost the region where their "home" port was located, and my trade income with them was lost though I still had the agreement. Even when they took the very same region back the trade didn't come back. There where numerous other routes that I could connect to them.

Nevermind the fact that I can't trade with my vassals Saxony or Poland whom are both surrounded by my borders...

Could Wine be a part of "other goods"?

There are only two instances of coffe in the entire world (Bahamas and New Andalusia iirc?)?? Wild guess is that there was originally another trade theater that was removed because of balance (Why can you go to Panama anyway? There aren't even any ports on that side. Perhaps it's quicker for the Marathas if they want to invade or something.). As it is, coffe has way fewer instances than wine but is still a special resource.