If you can get the stargazing scene after the bite scene, then that's definitely a fuckup from full release, the devnotes fully state that this scene works around the fact he's thinking of biting you later. It's supposed to be a direct tie-in with the bite scene, this is the description for that scene:
"Astartion starts the dialog lying on his bedroll, looking up at the stars. He's somewhat pensive, reflective, thinking that he might lose the ability to walk in the sun - even if it means ultimately saving his life. He gets up and is complImentary towards us, but he gets uncomfortably close and his compliments have a hungry feel to them. Really he's thinking that later tonight he'll come back and drink our blood. He excuses himself, but he's sure that tonight's the night he's going to feed."
This is interesting. I always thought he was internally debating whether or not to tell you he was a vampire in that scene.
If you play him as an origin character, there's a moment where he gets to consider admitting that he's a vampire, and one of the lines he says if he doesn't is the bit about his mind being leagues away. I associated that with the scene of him saying essentially the same thing in that scene as a companion.
It's this cinematic I'm looking for, but I may have misunderstood its trigger.
www.youtube.com/watch?v=JhlRQKy2-egAs a cutscene hunter, I take note of everything you say (thanks)... but managing to talk to the Gur without knowing Astarion's secret seems ... difficult.
This scene happens before the scene with Astarion sneaking off out of camp. You have to rest pretty early to get this one.