1.15 chunk glitch

Basically, random chunks will be completely different and unmatched every so often.

The Minecraft save is here: https://www.minecraftworldmap.com/worlds/ChVTd
(it was over the 10mb limit so i had to upload using another website)

(this was on 1.15 but i don't think it got fixed based on the information i got on what that update fixed)