I was playing through the Wardog Fury campaign mission 'A weapon from the past' last night and had this weird bug:
We were at the very last altar when the host got disconnected and a host migration occurred. When the migration ended, we were only three raiders and we had to restart to the first altar... Things went sour and we ended up losing the mission, unfortunately.
*It would be nice to implement some kind of checkpoint in those cases, so that if connection issues occur, the Lyra sphere progress is resumed to the last altar the raiders had reached.