Can Vampires autonomously drink from other sims?

"Kerrigan;c-18146812" wrote:
Hi Shae, an Enraged vampire will deep drink other sims is about as much as I can tell. They'll keep going until they resolve the enraged state.

I used to have 2 vamps who always went on biting rampages whenever they became enraged, but then it suddenly stopped. That's why I was wondering in my OP if perhaps that autonomous function had been nerfed at some point. I have since found a mod which restores that action somewhat.