Durge play through - didn’t have to pass any checks for Astarion to reject ascension?!

Hi!

I’m on my third play through, first as Resist Durge. During the Palace of Szarr scenes with Cazador, we wiped the floor with him and we run to the casket where Astarion tears open the lid and drags him out onto his knees. The cutscene plays, there’s back and forth, but there’s zero persuasion checks and absolutely no input from my Tav at all?! He murders Cazador (ferociously, as always) and sits crying immediately after in overwhelm.

Afterwards, we head to the cells and release all the spawn, and Astarion talks about it being the right thing to do at camp.

Has anyone else had this? I can’t tell whether this is a glitch, the game skipped a scene, or whether Astarion can truly choose on his own not to ascend (I understood because I’m a spoiler chaser that there’s always a persuasion check following an insight check, and if you fail or choose other options instead he will always choose ascension).

I was almost ready to let him ascend because of my Durge run, so I was taken by surprise (and completely ruined with pride and love) that he seemed to do it all on his own and was happy with his choice.