Hey!
Could you elaborate as to what exactly do you mean?
Does this happen every time or did it only happen once?
Does this happen only when you create a new save and then switch back or if you switch between saves as well?
Yes I can. When I switched from save file 1 to save file 2 and back to save file 1, every sim currently in the world (including sims with partners) had no attraction preferences. This is after every sim in save file 1 already had attraction preferences. Save file 2 is not a newly created save file and this seems to have only happened once.