This incident should be resolved as soon as possible! We cannot play with friends, no matter what we try.
The connection to the session is lost whenever either one opens a lobby and the other one is trying to connect, resulting in the connecting/error loop as mentioned by the thread opener. Even if Player A joins a public lobby (hosted by someone random), the connection to the session is getting lost as soon as player B tries to connect to the same lobby. It all works fine as long as you don't try to play with your friends.... 🤭?
Awkward problem regarding that this is a Bioware production, published via EA's Origin.