I had this with a brand new save and household I created this month! An elder sim had her blood drunk by Vladislaus Straud and she received a text telling her off!
Product: The Sims 4
Platform: Acer Laptop, Windows 10
Which language are you playing the game in? English
How often does the bug occur? First time I've seent it
What is your current game version number? version 1.109.185.1030.DX9
What expansions, game packs, and stuff packs do you have installed? All except, toddler stuff, menswear and two neweat stuff packs
Steps: How can we find the bug ourselves? Um.. wait for a vampire to bite you....
What happens when the bug occurs? Sim passes out, then gets text next day saying they drank blood!
What do you expect to see? No text
Have you installed any customization with the game, e.g. Custom Content or Mods? No, never played with custom content or mods, vanilla player 😉
Did this issue appear after a specific patch or change you made to your system: Unknown, first time triggered, pre reapers reward event
The issue I had is a little different. This happened in the file I was using for Reapers Rewards (which I've since deleted). My non-vampire Sim moved in with the Vatores because she was dating Caleb. I had Caleb drink from my Sim and another townie Sim both times with permission and then my Sim got a call about how they couldn't believe my Sim would drink from someone without permission.
