I have only observed this during thunderstorms. They all go towards a desert, which is opposite of the place I got the from, the snowy taiga, both in location and biome.
The place where they are already has a artificial village with villagers, beds, bells and job sites.
Confirmed 1.16.3. My bee farm is driving the sounds crazy, even though they barely make any noise.
Confirmed 1.16.3
Screenshot added
This biome actually has a very interesting terrain generation. It does seem like all the "hoodoos" are individual structures and this can be observed in Minecraft Win10 past X/Z ±12582912.
I'm guessing to fix it, the whole terrarin generation code would need a rewrite.
Confirmed 1.16.2
I have seen this world and can find it in 1.16.2/1.16.3 . It would be disasterous if a lava lake generated instead.
Confirmed for 1.16.4, can't hear item frames, paintings, armor stands, tridents. Those are just a list I have came up with. There must be much more.