This isn't a bug, it's just an oversight from Larian because they probably didn't expect anyone to go through the game this way. Though they should definitely make it so that Raphael translates Astarion's scars at camp after you take care of the orthon, regardless of whether or not Astarion spoke to him outside of the mausoleum.
Definitely yes to this. I did several Long Rests and the scene never triggered.
They definitely also need to fix that "We haven't spent a night together in quite some time..." not disappearing after interacting with it in Act 3. It's still there even after finishing Astarion's quest.
Quite the slap to the face to hear it, after everything that went on at Cazador's Palace!
