Redstone does not align correctly when "cut" by farmland block and grass path block.

As you can see in the screenshots, The Redstone does not align correctly when it is cut by farmland block or grass path. I expected the Redstone aligns itself as it aligns when cut by slabs, glasses, stairs and Glowstone.

Steps to reproduce:
1- Place a block
2- Place a redstone on top of the block and the other side of the block.
3- Place a grass block on top of the Redstone cutting the circuit.
4- Use a shovel or hoe to turn the grass on grass path or farmland respectively.
5- Done! The Redstone should connect but it does not.