Hello, did you declare a blitz with the next player to trigger the bloodlust bite?
It's a known bug in this case, it will be fixed soon but you can avoid it by using the "Bite" action in the contextual menu or by not declaring a blitz for your following action.
Yes I did declare a blitz.
Check this screenshot out. So I left my Vamp next to a thrall and then declared a blitz with my other vampire. The game got confused. 0_1504770999087_Screen Shot 2017-09-06 at 17.06.04.png
Thanks for the tip!