So I was just exploring the new 1.17 version on a random seed. When flying around I found a plains village with a wrong generated fountain. Half of the "tube" going down is moved 3 blocks in northern direction.

The only thing I changed in the world generator were the gamemode (creative) and the difficulty (peaceful), but I guess that isn't the reason.

When flying around a bit more, I found a second plains village with the same problem.

Seed: 7285490585802005637

/execute in minecraft:overworld run tp @s 1559.67 69.96 732.26 1587.20 28.34

/execute in minecraft:overworld run tp @s 886.78 69.91 800.76 75.31 46.32

Next I tried another seed but there everything was fine. That's also why I cant't quite figur out what the problem is.

I added a picture of what I mean, the lower part of the fountain (=the right part) was covered normally, I just removed the blocks for understanding what I mean.

If there are questions just contact me.