The current pre-release of the client ("pioneer" in the version) is only compatible to itself. So you can only play with other testers. Please be aware!
Yea notifications have been completely broken for me for weeks now. I've had to turn them completely off. If not, they just spam repeat the same notifs over and over again. More recently as of a week or two ago they're not even useful because they just say "Player has joined null"
