I go into the previously created game world created on version 1.17.30.21 and saw that the clouds are on the ground, not in the sky.

To reproduce:

1) Download Minecraft for Windows 10 1.17.30.23,

2) Create new world with Experimental settings on minecraft version 1.17.30.21,

3) Enter the world created on version 1.17.30.21 on Minecraft version 1.17.30.23

4) And look at the ground.

Observed results:

The cloud's on the ground 

Expected results:**

The clouds must be in the sky.

Seed: -477156033

World setting in screenshots.