I experienced something similar in the previous snapshots, 21w39a and 21w40a. Was unsure if it was a bug or if I just got a lucky seed.
World Type: Default
Seed: -3584105611421341641
The place where I specifically noticed this was around -415 63 560
There are three surrounding Ocean Monuments:
-447 63 704
-639 63 624
-256 63 256
A little bit further away I found another -864 63 1280
Can confirm it happens for me on both an upgraded world and a newly generated world, on most passive mobs and hostile mobs
I experienced something similar in the previous snapshots, 21w39a and 21w40a. Was unsure if it was a bug or if I just got a lucky seed.
World Type: Default
Seed: -3584105611421341641
The place where I specifically noticed this was around -415 63 560
There are three surrounding Ocean Monuments:
-447 63 704
-639 63 624
-256 63 256
A little bit further away I found another -864 63 1280