Minecraft has strong fps drop:?

I have such strong fps drop in minecraft that it is unplayable. I have ultra quality 24 chunks 1080p resolution. Normally, the fps are always around 200. I limited the fps to 144, everything goes well then, then the fps drop to -1 at regular intervals, which is not frames per second, but seconds per frame. That annoys me I also assigned 15 GB of ram minecraft. And everything else adjusted, strangely enough that only happens when I play my own world. It doesn't happen when I play on the server. I'm really desperate, can anyone help me?

My pc

Gtx1660 super (oc), ryzen 5 3600, 500 watt be quiet.

I would set the chunks to 8-12 in your place, that's enough. And not limiting the FPS helped me too.

You could try to change some things in the Minecraft end positions, for example lowering the visibility or something.

I've already tried to do the graphics settings all the way down. At the end it had 2000 fps, and still this fps drop. I got the idea that it's the version.

Which version are you playing in?

If I make my own world then the newest one, there always comes this fps drop. If I do pvp on server then on 1.8.9. Since I don't raise a fps drop.

It can very well be that it is because of the version if you think that it runs perfectly in 1.8.9. I also had problems with my FPS in 1.16. Sorry that I couldn't really help. LG