Time/Sim freezes while environment still moves (1.128.90/2.39)

this is happening in my forever save and i’m devastated. i’m on console so there’s no way mods are an issue. It’s only happening in my main household from what i can tell. i have two young adults and an infant.  I can play normally for about 5 minutes and then i can’t switch between sims , the camera shifts as if it did but the IU doesn’t change. time won’t freeze but build mode will open right away. nothing will place, it will say system error. i thought it was bc of the large lot but even if i travel the game still isn’t processing the interactions without a 1-2 minute delay. i’m very frustrated bc this has been happening since they announced the update and ive been playing in this save for almost a year now i dont want to lose it!