Hi! I doubt that it's a bug, since we spent months on fixing this quest (it was pretty buggy at first). Usually what you describe happens when the player fails some of the triggers for the quest. Like, if you killed or aggroed one of his buddies or Krasnoznamenny, or became an agent of Chaos. Are all of his buddies friendly to you? Did you gather them? Is the quest completed?

All his buddies alive and friendly. Quest did not started, so I did not gather them.
Your team answer me via email, also.
Pretty sure it was some questions about maps without taking quest. That make Strategis suspicious.
>Он ушел, так вы насторожили его подозрительными расспросами о картах. А потом долго не появлялись.