Structure blocks don't display their mode and name when looked at

The Bug

When you hover over a structure block, it used to display the mode and name, allowing players to determine which structure loads which without accessing the GUI. Now it's gone.

Steps to Reproduce:

1. Summon a structure block with its "mode" set to "data" by using the command provided below.

   /setblock ~ ~ ~ minecraft:structure_block[mode=data]
   

2. Look at the structure block and take note as to whether or not it displays its mode when looked at.

Observed Behavior

Structure blocks don't display their mode when looked at.

Expected Behavior

Structure blocks would display their mode when looked at.

Code Analysis

See Earthcomputer's comment.