I just ran into the casino outside the abyss and I was automatically disomounted which is a game mechanic when your in the casino. so I started to move towards the door and when I went to remount my horse I was in war mode which I guess flagged on the horse. It just went poof and followers went to 0/5. logged out and in and its just gone. not a big loss but still not an intended game mechanic im almost certain. beware. thanks.