I've applied Patch 1.3013 to Lost Alpha, but I did not start a new game.
I was already in the dark vally.
No when I get the quest "Talk to Petrenko" (duty at the bar was attacked be mercs) after talking to kruglov and sacharov finished to repaire the PDA. - Petrenko will try to open the the door to the house, one needs to go through before the entrance to the bar, in an endless loop. If I try talking to him he will only let me repair my stuff, but not tell me anything new. This does not even change if I kill him.