Time/Sim freezes while environment still moves

I urgently need help  my save in The Sims 4 EA App has become nearly unplayable. It’s very large, with 3 generations and multiple families, and I have invested months of time and effort. The problem is severe exactly at 8 03 AM, every family in this world lags so much that the game almost completely freezes, making it impossible to continue playing. I have removed all mods, used a clean folder, and tested new saves, but nothing helped. Temporary workarounds, such as clearing cache or disabling mods, also fail. This issue affects only this one world. I urgently request technical support and guidance to fix my save without creating a new one, as I am deeply attached to this world and families. Thank you very much for any help or suggestions.