Items in shelf falling_block are invisible

A minecraft:falling_block carrying the data of a shelf block which contains items will have an unexpected appearence - the shelf renders just fine, but the actual items in each slot cannot be seen at all. Only when the shelf touches the ground, stops being an entity and becomes a block do the items within become visible.

The expected results would be for the items in the shelf to be able to be seen even when the shelf is in the falling entity state, since the entity has the data that specifies that those items exist.

To reproduce, run this command and watch: /summon minecraft:falling_block ~ ~5 ~5 {BlockState:{Name:"minecraft:oak_shelf"},Time:1,TileEntityData:{Items:[{count:1,Slot: 0b,id:"minecraft:red_dye"},{count:1,Slot:1b,id:"minecraft:green_dye"},{count:1,Slot:2b,id:"minecraft:blue_dye"}]}}