Snow layers do not fall instantly when a block is broken under them

Summary:

Snow layers lost its "gravity" and now if you place it in the air (you can also use a command), it will fly in the air, and will not fall. Of course, over time, he will still fall, but not immediately.

In version 1.17.10 it has "gravity".

Steps to reproduce:

1. Place the snow layer on the block.
2. Break the block.

Observed results:

The snow layer will float (and will fall over time).

Expected results:

The snow layer falls immediately.

Video:

1.17.10
Minecraft 2021-07-15 23-05-29.mp4

1.17.20.22
Minecraft 2021-07-15 23-14-06.mp4