Blocks can be seen from the inside of powder snow, causing z-fighting

Summary:
When the sides of powder snow and almost all blocks (including all full blocks) touch, textures are superimposed inside powder snow.
Before version 1.19, the problem was only with some blocks, and now with almost everything except for some...

Steps to reproduce:

1. Place powder snow two blocks high.
2. Place blocks near powder snow.
3. Go inside powder snow.
4. Look at the side that is in contact with the placed block.

Observed results:
The adjacent sides of powder snow and the placed blocks will have different pixels and texture overlays.

Expected results:
There should be no texture overlays.

Video:
2021-03-15 10-54-12.mp4

Image: