Ender dragon disappears after 64 blocks

^{Update by [Mod] EVGENSYPERPRO}
Summary:
Ender dragon disappears after 64 blocks. You can see ender dragon unlimited distance in version 1.18.0.

Steps to reproduce:

1. Summon an ender dragon.
2. Get more than 64 blocks away from him.

Observed results:
Ender Dragon is no longer visible if you move 64 blocks away from it.

Expected results:
Ender Dragon will be visible at any distance, as in version 1.18.0.