Fulfilled one of the quest points and killed the fallen captain on that ship. Then i saw the scavenger of the fallen and killed him in melee (rest in peace, scavenger), after that, apparently, accidentally pressed E and the door that was near him opened. Then i tried to open others and some of them, where the spawn of opponents were also opened. This is only seen on this ship. Perhaps this bug is associated with the doors that are used there, I do not know, but here.