Thank you for playing Dark Alliance and for providing feedback to the team on your experience. We have released a minor patch to the game today, which addresses the majority of disconnects happening at the end of a mission.
Tuque Games is hard at work on a more substantial update to the game that should be ready to release in the next week.
If you encounter a new bug, please report it here: https://darkalliance-support.wizards.com/hc/en-us