My sims age keeps resetting

I recently downloaded TS4 on pc and i started a family, one of my young adults won’t age up because every day her age resets back to 27 days until her birthday. I have no mods besides 3 pieces of CC so i doubt that’s the issue. I made another save to do the 100 baby challenge and i have the same issue with my matriarch. Are some of my sims bugged? because this age up glitch only happens with two of my five sims. pls help it feels unplayable bc one of my sims is almost an elder and their wife is young adult