Milestone & Relationship Disappearing

Product: The Sims 4
Platform:Mac
Which language are you playing the game in? 한국어
How often does the bug occur? Every time (100%)
What is your current game version number? 1.104.58.1230
What expansions, game packs, and stuff packs do you have installed? Expansions: All except Horse Ranch Gampack: All except Werewolves / batuu / Jungle / Parenthood Stuff: Knitting / Tiny Living / Moschino / Vintage Glamour / Garden / Party Kit : all except few
Steps: How can we find the bug ourselves? Leave household and sims will have lost milestones and relationships they previously had.
What happens when the bug occurs? Sims lose most of there milestones and relationships they previously had.
What do you expect to see? Milestones and relationships restored
Have you installed any customization with the game, e.g. Custom Content or Mods? Yes
Did this issue appear after a specific patch or change you made to your system? Neutral/Not Sure 

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