I'm sure this is a bug that's been mentioned before, because it's been there in every patch, but you cannot get Astarion's nightmare cutscene after the second tadpole dream if Shadowheart is at your camp. (The scene where you wake him up from the nightmare.)
I used to be able to get it by downing/killing her temporarily, but you can no longer long rest if a companion in your party is downed or dead. So the scene is impossible to get if Shadowheart is recruited. The only way to get it is if you dismiss her then permakill her. It's not possible to resurrect her via scroll or Withers the skeleton if you do that.
Not getting this scene also seems to lock me out of the scar reading scene, even if I romance him and see the scars that way.
