[Bug] Entities above 256 are not rendered in some situations

[Kademlia]

Description of Issue

Entities flying/spawned above 256 world-height are not correctly rendered if the client is close to them and looking in specific angles.

This problem only appears above ~256-275. Below that height it works fine.
Glowing effect, invisibility is optional. Spawning any mob above ~275 will be invisible.

Steps to Reproduce

1. Use a command like /summon pig ~ ~75 ~ close to the world-max-height to spawn a pig
2. Move out of the current chunk into another one
3. The pig will now be invisible until it enters the building-height

OptiFine Version

1.16.4_HD_U_G5

Installation Method

standalone installer

F3 Debug Screenshot

Video examples of the difference:

https://youtu.be/bAPmXIXP-r4

Prior Testing

• This does not happen in vanilla minecraft 1.16.4

Additional Information

As stated my observation is:

• Does NOT happen to a freshly spawned mob instantly
• Happens to all mobs after moving out of the current chunk
• Visibility depends on viewing-angle/distance to the client as well (see Video/Gif)
• Possibly related to [1.16.x] Hostile mobs appearing invisible and invulnerable. #5016 but very easy to reproduce

[MrScautHD]

i think that is normal, we need make mods compatible with it