i recruited astarion but kept him at camp, after that i talked to the hunter near the hag's house, and told him "come to my camp" to kill astarion.
i went to long rest afterwards, and i had a dialogue option with astarion about "so and so told me that you're a vampire" but i didn't choose it cause i thought he would be alarmed and ruin the event.
then i went to sleep and astarion tried to bite me and i removed him from my party.
the whole hunter thing never got brought up again, of course.
however, i feel like that's not right? i mean, im assuming the night events are scheduled and have some sort of priority and the biting event came first, but that feels wrong.
it was the first time i long rested since recruiting him, by the way.
i feel like there needs to be a specific event for the hunter coming to your camp while astarion is trying to get a taste of you, if there isn't already and it's not a bug.
that, or give whatever happens with the hunter an higher priority.