Falling trial spawner blocks with definition do not render contents

Falling block entities carrying trial spawner NBT will not render the mob within at all, even though it’s part of the block and is correctly rendered when in placed block form.

To reproduce: /summon falling_block ~ ~ ~ {BlockState:{Name:"minecraft:trial_spawner"},TileEntityData:{normal_config:"minecraft:trial_chamber/breeze/normal"}}

Expected results: the breeze would be visible within as it falls.

Actual results: the breeze is completely invisible until the falling block entity is killed due to becoming a block.