Water is broken when breaking waterlogged small dripleaf plants

When you place a small dripleaf plant in water, and then break it, the water is removed with it, as you can see in the video below. If you try this with another waterlogged block, let's say a slab, and break it, the water remains. It does not work for small dripleafs.

 

Edit: Sorry for the short video, it had to be 10MB or less.