Playing on PC after the latest update: I am also having this issue, especially when all three of my current Sims go to bed, and time automatically skips to 3x speed. It doesn't matter what time in-game. I tried to play without any mods after the update and saw this was happening, waited for my usual mods to update, installed them (MCCC, Simulation Lag Fix, Simology Panel Fix), and it is still the same.
When I click save in-game, it loads and then blips as if the process did not go through. I've tried to go to Manage Worlds, and this leads to an endless loading screen.
I cannot play the game for more than two minutes before my Sims are frozen, the environment continues moving around them, time progresses, I cannot move out of 3x speed, nor can I exit out of the game without using Task Manager.
I hope this gets fixed soon so I can actually play the game.