I am new and just got a code today and there is a few bugs in the beta I had a issues where my character would not move at all and I lost connection several times with the host so far the game is fun. I am still trying to work on the vita version.
If you're freezing up, either the host is lagging or you're experiencing packet loss. It happens if someone in your home is hogging the bandwidth. (Using he internet or phone line as well.)
If you lose connection, it's probably because the host left/ragequit.
Or the servers aren't perfect.