Call me crazy but I think this isn't the only delayed audio on ME3 LE that is delayed, I have the romance scene on the Cerberus Assault bugged as well, when Ashley starts speaking about what's wrong you hear the dialog but her lips won't move and then the mouth moves without words (I read somewhere that Kaidan Alenko also has some bugs in this part). I mean we are getting close to that final mission after Cerberus Assault (Priority Earth should have been a Collector Assault but way bigger) which was lacking and then we have to content with all these audio bugs.
@draconiamCheck this thread I started about a month ago. Sounds like the same issue I had. I linked some vids I put on my Twitter, and if this is the issue you are having, make a reply to bump it up the list. It will probably get buried again, but worth a shot anyway.
Mass Effect 3 Romance Cutscene Bug Xbox1
