Some entities don't update position to the client when teleported

The bug

When you try to teleport certain entities using the @e selector, they do not move visually (i.e. client-side), but actually move server-side. You can then for example not hit or interact with the entity and must reload the world to see its real position and hit it again.

Affected entities

• Area effect cloud (minecraft:area_effect_cloud)
  Only when not changing size (?)
• End crystal (minecraft:end_crystal)
• Fishing bobber (minecraft:fishing_bobber)
• Lightning bolt (minecraft:lightning_bolt)

How to reproduce

1. Enable F3+B
2. Run

   /summon minecraft:area_effect_cloud ~ ~ ~ {Radius:0.5,Duration:9999}
   

3. Go some blocks away
4. Run

   /teleport @e[type=minecraft:area_effect_cloud] ~ ~ ~
   

   → Notice that the Area Effect Cloud did not move

5. Close the world and re-enter it
   → Notice that the Area Effect Cloud now changed its position

Code analysis

Code analysis by Marcono1234 can be found in this comment.