Anything concerning sims seem to be delayed on lots with large amount of sims on Speed 3.

"SimGuruModSquad;14767812" wrote:
This generally means the simulation is bogged down for some reason. There are many reasons why this might happen - could be autonomy, could be routing, could be something else. They are often specific to a game situation. The issue will vary by machine spec, although your machine looks pretty good.

We address them as we encounter them, and it's always helpful to have saves that exhibit the problem. If you could post your save with as much detail about how to reproduce the issue as possible that would help.

-SGMS

The problem occurs in all my saves, regardless of how old they are.

To reproduce:
1. Do something that results in a large amount of sims being simulated, like starting a club gathering, or going to a community lot.
2. Change clock speed to speed 3.
3. Watch the game slow down.

I've tested with mods, no mods, high graphics, low graphics, and none of them made a difference.

Here's a video showing off the bug. Youtube video

Although this bug seems to not be related to saves, I have a new save file which is brand-new. It's been saved at the exact start of the video above.
Dropbox link