I'm on PS4, as of version 1.13 several game breaking bugs have been affecting the vampire life state.
1. Earning Vampire XP (the purple bar on the Needs menu) after you've reached the highest Vampire Rank (Rank-not Aspirations, those are fine) is impossible as the XP bar stop moving after you gained 1 additional level past Grand Master.
2. Any changes made to vampire perks/weaknesses via the Draught of Reconfiguration do not register, the game still behaves as though you haven't changed anything. Furthermore, when using the Draught of Reconfiguration and attempting to pick perks that you have already picked AND have more than one level to them (eg- Fitful Sleep or Sun Resistance) will result in the player only being able to pick the first level of it even if they have the points for the next level.
3. Attempting to solve the issues above by curing your sim of vamprism (legitimately or through cheats) and then being turned back into a vampire does not work, you retain your rank and everything that comes with it when (correct me if I'm wrong) your rank is supposed to be reset o the very bottom, no points, powers or weaknesses.
I'll post this up on the bug report forum if I'm able (don't have a working computer, using my PS4 web browser) but I really hope this all gets sorted out sooner rather than later.
Edit- The bug report form does not work on the PS4 web browser.