The Bug:

The azalea and flowering azalea textures are not vertically centered.

Steps to Reproduce:

• Give yourself an azalea and flowering azalea.

/give @s minecraft:azalea
/give @s minecraft:flowering_azalea

→  Notice how these textures are not vertically centered in the inventory.

Information:

It appears that the azalea and flowering azalea textures are too high in the inventory, leaving a large amount of empty space around the bottom. This could be intentional. Relates to MC-217608.