Oooh wow, I had no idea it was that bad before the hotfix! (I only tried to romance people on Patch 3 after the hotfix was installed). That's a bit disheartening, as I was especially looking forward to seeing the updated scenes for Astarion in person, rather than via teaser gifs on Tumblr and such. But it's a bit a relief that I am not the only one!
I wonder if there is something that triggers the issue, because other people have evidently been able to initiate cutscenes as they were supposed to!