I was doing my expert roulette when one of DPS guys just got hovered above ground our of the blue. It was in Lost city of the Amdapor HQ before second set of eggs. Time was around 18:04 by my GMT +3 time. Pal was not doing anything special, just usual dpsing actions.
Here are some images of bug:
http://i.imgur.com/82Y6Rf9.png
http://i.imgur.com/bfaKc6C.png
http://i.imgur.com/xoyqnVS.png