Sugar Being placed on water

When placing sugar cane, there is chance for the sugar to be placed in the water.

What I expected to happen was...:
it supposed to not be placed just when placing it to any other block other than sand and grass/dirt.

What actually happened was...:
It gets placed on in the water, if there is dirt on the water.

Steps to Reproduce:
1. Place Cane next to a water source on a dirt/sand block
2. Take the cane and right click it next to the cane next to water source