When you enter and leave the world several times. There is a problem of tick, mob and day cycle.

[KnightMithridatis]

When I first created the world. Everything was working normally. After a while, mod causes a timing (tick) problem in the game. When I hit the mob, it hangs in the air for a while. The day cycle freezes. I didn't understand why. But when I deleted the flowing fluids it was fixed.

[Daniil0891]

This sounds like your pc is struggling to run the mod, it's very compute intense. It lags for me too, I hope the creator will improve it soon

[KnightMithridatis]

This sounds like your pc is struggling to run the mod, it's very compute intense. It lags for me too, I hope the creator will improve it soon

It was embeddium, who caused freezing in animation and entities. I have tried the mods one by one for a few days. There is no freezing when there isn't too much entity around. So it made me think it was about config or other mods. When I deleted embeddium, fps went down from ~100 to 30. But the freezing i saw in clockwork, flowing fluid and entities disappeared. Embeddium isn't that good performance mod.

Flowing fluid works well. However, it would be nice if you could increase the performance of flowing fluids a little more. My computer has 11400h, 24gb (3200MHz), gtx1650, nvme ssd. So it's not so bad.

In addition, Immersive Optimization mod caused problems with animation and entities. Seriously a very convenient problem. In other words, every mod that optimizes the entities can cause such a problem. Thanks.