Cramming too many falling snow entities into space breaks the block above

When a falling snow entity lands on top snow, it increases the height of the stack. By packing a bunch of snow into a small space, the snow stacks up and breaks the block above. This glitch can be used to break bedrock or other indestructible blocks.

How to reproduce
You can set up a "snow crammer" by having 3 blocks adjacent to a space (below the bedrock you are trying to break. You stack 7 snow layers on each block. Using sticky pistons, you can briefly pull the blocks out, and the snow gets pushed into the space as the pistons extend again.

I attached a world download that includes a sample setup, as well as a book with the remaining instructions. Please comment if you have any questions.

Expected result
The snow is blocked by the bedrock, and a snowball is dropped as a result.

Actual result
The snow continues to stack up, breaking the bedrock.

Other notes
I was able to stack the snow higher using MCPE-62777 (which appears to have been fixed in beta 1.15.0.1). It should be noted that the snow can only break 1 block at a time; it stops piling at the top of the block that was broken.