Summary:
In bedrock version, if you push any type of leaves with a piston, the leaf block disappears.

Steps to Reproduce:
1. Go to bedrock edition.
2. Put a "leaves" block.
3. Put a piston next to the "leave" block.
4. Then power the piston.

Observed Results:
When you push a "leaves" block with a piston, the "leaves" block disappears.

Expected Results:
The "leaves" block should show up when pushing it with a piston.