see the video. I really don't know how to explain...
I have beginned another one time the "survive" campaign and when Adams talk to me, in "normal situation" when he begin to talk, after some phrases he continue moving the mouth but I didn't hear nothing...
Watch the video for another example in "bootcamp" campaign
https://www.youtube.com/watch?v=aAcjc0DdF0E&feature=youtu.be
wow Every time Adams speak more than one phrares... the bug appear.
Another example: https://drive.google.com/open?id=0B1zFa4nl9rSwUnh6c1J5Y1VfUVE