Camera movement becomes periodically unsmooth

I just noticed that the bug I was describing here actually affects the entire camera movement.

reproduce:
this affects all worlds, but there is a very good way to reproduce it.

• Join the server Lifeboat

• Join the Survival Mode

• Stay there for a while

I don’t know why this server triggers this bug so intensely, but it seems reliable. Nothing feels smooth—nothing is smooth; it’s like the game toggles the max framerate down to 10 fps every few seconds, then becomes normal again, then goes down again—I don’t think it has anything to do with FPS, though. Especially when you do slow movements like sneaking or moving the camera around slowly, this bug becomes very noticeable, and it’s just terrible.

Restarting the game seems to help, but the bug will return and become worse and worse, until the next restart.

expected:
everything is smooth

observed:
camera movement looks like it has a low framerate from time to time

since over a decade there wasn’t a month I haven’t played this game, there were barely any weeks I haven’t played it. It’s such a big part of my life and it’s just so depressing seeing these bugs, you can’t do anything about it, and which are literally in every part of the game—it’s the camera movement which is broken, you can’t escape it. I will stop playing this game until this bug is fixed, it can’t be that there are hundreds of bug fixes while the game gets worse and worse and bugs like this which you literally can’t escape just stay there, keeping the game ugly.

I don’t know if that has anything to do with the components used, but if needed:
RTX5080
Intel Core i9-14900KF

Note:

Its only good visible at higher framerates, like 90, 120, 144