1.20.3 Pre-release 1 changed the name of foliage grass to "short grass" to avoid confusion with the grass block, especially in commands where the foliage would be suggested before the more frequently used block. However,

• This name fails to achieve parity with Bedrock Edition where "tallgrass" has always been used in commands for the foliage item. (See MCPE-177051.)
• This name does not make sense. The "tall" in the Bedrock name, "tallgrass", presumably refers to the fact that foliage grass sticks up above the block that supports it. It is therefore taller than plain/normal "grass" that is just the surface texture of a block you can walk on. Furthermore, phenomenologically speaking we walk through grass that is tall, and we walk on grass that is short. The new name "short grass" seems to be an attempt to distinguish the 1-block-high grass foliage from the 2-block-high grass foliage. However, Bedrock already makes the distinction between the shorter and taller foliage by using the names "Grass" and "Double Tallgrass" for the inventory items, and variants of "tallgrass" and "double_plant" to access the items in commands. The Bedrock names make more sense (a) logically in reference to the shorter and taller foliages both extending above the even shorter grass of a grass block, and (b) phenomenologically in reference to both foliages being blocks that you walk through, not on.