While playing with one friend in a friends only or invite only session, the friend will inevitably get kicked from the mission. We have been able to complete the first adventure within the first 4 hours of trying the game.

Steps:
Both computers are Windows PC running the Steam version of the game. Friend plays Bruenor, I have played both Wulfgar and CatteBrie. We have tried with ad blockers disabled, VPNs disabled, VPNs enabled to "put" computers in different states.

The Result: friend gets booted and we cannot play the game

Expected result: friend does not get booted and we can play the game.