Bug on station Theta (SOMA)

In General, at station Theta, after a failed attempt to launch DANBAT, which revived NIU, ventilation sneaking into the lab where I should have broken some sort of man lift, and go down to the lower level of the complex. In the laboratory chasing me handy monster(not a cyborg, not a robot, and a mutant, no electronics and all sorts of tools). So, when I just for interest, in the security room, where the main control panel for the door locks, I lure the mutant into one of the rooms (namely honey.lab), he walks in and I take a moment locked door of this room, and there he remains seated. And I in my turn go about their business satisfied, no longer fearing the mutant. And what do you think? Once I start to make noise, he on the sound of the noise runs because of the angle and I again have to hide from him. I am at a loss go back to the room where I locked him in - there all doors were locked, so to get out he could not. Unlock door, go into the room - and it's not there. And where has he vanished?? How he managed to get out of the locked room?? This is a bug chtoli, or developed decided to make life difficult for the gamer?? Who does not know?