There was a problem with the game's cheat detection system. It automatically banned the back rider because it detected them moving without any input. I don't think there were any further updates on that.

A group mount option was added to the player interaction wheel in the patch before last I believe, so it's probably SOON.jpg
What a mess. They must really hate money lately.tomofhyrule wrote: »That was a while back when they were first shown off with Greymoor's release. They were recently fixed and put back on PTS within the last few months (either with the Deadlands or Ascending Tide DLC) without that bug, but there hasn't been any word on when they're actually coming yet.