Yah, my son and I have the same issue. We can type in my IPv4 address and it still doesn't connect. but when either one of us hosts it it shows the IPv6 address as the server address.
Posts made by The212Dad
When I try to host, it shows an IPv6 address for my server address. I have even disabled IPv6 and it still does it. We can not figure out how to connect to my games. Why is it running on my IPv6 address instead of the IPv4?
Same problem I think hosting online - we can't get another computer to connect to my game. (I do have Port 3300 successfully forwarding)