Has anyone had a random encounter with 2 dead Vigilants of Stendarr surrounded by vampires and 1 live vigilant who turns into a vamp?

This happened to me at Sarethi Farm along with an Ancient Dragon and 2 other vampires hanging out on the porch, all at the same time.

The really strange thing was when i approached the group of vamps and the living vigilant they became hostile right as 1 of the vamps started to say something like "Hey Stranger!"

I think there could be more to this encounter but i just missed it because they preemptively went hostile.

Has anyone had this encounter play out differently ?

That happened to me, only I was in Vampire Lord form, so I can't really say what was supposed to happen haha

The same happened to me somewhere close to Castle Volkihar (northern coastline). I think nothing else happens. One of them says something (Hey Stranger!) and when you're close, they attack.

Had this happen to me too.