The bug
When using F3
+B
in order to show hitboxes, the inner hitboxes (green) of the ender dragon are rendered with a huge offset.
Related issues
is duplicated by
Attachments
Comments

[media][media][media][media][media][media][media]

They seem to still render, but just far away from the dragon itself. Some distance up in the air.

The distance actually changes with the distance from 0,0.

Confirmed for 1.15 pre-7.
[media]
Still an issue in 1.15.1

Confirmed for 20w06a.