Hovering over an entity name in chat doesn´t show entity information

The bug

When you hover over an entity name in chat, it should show the entity UUID and the entity type.

How to reproduce

• Say something in chat and hover over your username. No hover text appears. (the click event still works)
• execute the following commands:

  /summon minecraft:armor_stand ~ ~ ~
  /say @e[type=!player,limit=1]
  

• hover over the entity name; no hover text appears