Saplings can be placed on Farmland and float 1 pixel above it

Story
Day 0 - Basically, I was playing on survival mode. On the start, I got a jungle spawn, and I received extreme luck while hunting enemies. 

Day 1 - While there was no sheep, I couldn't sleep. But I started planting melons, and I placed a jungle sapling above farmland. As such, I noticed saplings float 1 pixel above. 

Default physics of saplings
Saplings, normally, are placeable on earth, and if they stay in the air, they simply turn into an item entity.

The bug

• Ocurrence frequency: Always
• Priority: Low

Observed results:

The sapling does float in some cases because the farmland below it is 15 pixels tall.

Expected results:

The sapling above the farmland should go down 1 pixel(that's what I will mention for the fix!).