While riding/having a dragon on your head (I tested Alpine and Silver glider and happened with both) at high altitudes (in my case it was about 200-220 Y level) , after going in a straight line for some time (about a minute or less) , at a certain point they just straight up disappear. No warning no nothing. I fell off and they just weren't there anymore. /tp worked but they were invisible and i couldn't see their hitboxes with F3+B , and the only way to fix it was re-logging

Latest wyrmroost version , 1.16.5 , forge version 35.1.37

Steps to Reproduce:

1. Ride a dragon
2. Go to a high altitude
3. After a while , the dragon just flat out disappears and you get dismounted

Description of issue:
Dragon disappears out of existence , /tp works to teleport them to you but they're invisible , only way to fix is relogging

Forgot to mention but i had the Umbrella from Artifacts equipped which gives slow fall , that might have affected it