When I tested it I only got something similar to the first screenshot and no way to advance dialogue.
Yeh, you gotta be patient until you hear any dialogue from Astarion (or whoever you romanced), then spacebar and right mouse button are your friends to get through it. Unless you play on console or with a controller, I dunno what's the default skip cutscene button there.
You know what's even more funny? Lae is supposed to be gone on a dragon ride, right? Well, I can still swap the character to her (or Jaheira) and everyone has 1 hp. I know Larian made everyone immune to damage during end game cutscenes, but there was a guy on discord who died during one of those cutscenes (took damage from the Markoheshkir staff passive) and the game just cut to ending credits. Hahaha Larian really messed up the ending sequence badly!
