Snow Generrating in harsh straight unnatural lines

Can you provide more context to this?

It would be helpful to know:

• Was the world created solely in 1.18pre-6?

• Was the world upgraded from 1.17 to 1.18pre-6?

• Does this issue seem to describe this issue well? MC-125007

Also, please provide the world seed; coordinates alone aren't enough.

Uhm, also this just looks like normal terrain to me... it's a stony shore next to a snowy mountain.