snow blocks near the ground get deleted when it snows.

ive noticed it on my mountain project where everytime it snows about 50% of the snow blocks at the bottom 2 layers vanish leaving holes on the mountains. it has happened both before and after the 1.16 update, and seems to only happen when it rains/snows. the blocks that get deleted are always at the edge of a large amount of them within 2 blocks of dirt or grass.