Tilled Farmland bug

Not sure if this is intended or a bug, but when you place a solid block over farmland within close proximity to water, the farmland turns to saturated farmland instead of turning to dirt, when you place and break a solid block over saturated farmland within close proximity to water,  the same thing happens, but it says as saturated farmland instead of turning to dirt.  If the farmland is not within close proximity to water it works as intended.

 

what I expected was

The farmland would turn to dirt when a solid block was placed and broken over it, whether it was saturated or not.

 

what actually happens was

the farmland in close proximity to water would turn to saturated farmland or stay saturated farmland when a solid block is placed and broken overtop of it

 

how to reproduce

place a water source block in the ground, or find a body of water, and till the grass within 5 blocks of the water to turn it to farmland, then place a solid block on top of it, and break it.