Suspicious sand/gravel drops as an item after 30 seconds of existing as falling block

Suspicious sand/gravel drops as an item after 30 seconds of existing as falling block. This causes the block to be obtainable using soul sand and water or a series of cobweb blocks.

You can reproduce by placing soul sand and water under a solid block that the suspicious sand is on top, then break the block that is holding the suspicious sand and it will be bouncing in the water bubbles, after some time it will break the suspicious sand droping it

Video: https://www.youtube.com/watch?v=QAD9Vn0QrX8
(I used creative to reproduce more easily, but you can do this in survival with the instructions above)

Note: NBT Data isn't stored