Corrupted world after updating to 1.17.30

It's unbelievable how many bugs it has after we updated our 1.17 Minecraft Realm - Caves and Cliffs Experimental feature activated -, just look at all the pictures that are attached and see for yourself. A mountain even has deepslate above y=16. World seed: 640938123.

A lot of trees, as shown in one picture, are completely corrupted, those are just a tiny bit, leaves are splattered a few blocks away from where they should be.