At the time of entering the nether there is too much difference between the floor and the ceiling of the nether reaching a point where you can only see a part or directly you can not see anything. I put a link because the video where I show it does not allow to put it.

Version: 1.18 experimental snapshot 1/pending

https://drive.google.com/file/d/1Yb-Ny847tfk-KUAaEGmrVmeZOl4VtYeX/view?usp=sharing