Versions
Forge: 1.16.5-forge-36.0.13
Wyrmroost: 1.16.3-1.2.11

Steps to Reproduce:

1. Open game
2. Make a new world
3. Spawn via spawn eggs or commands 50 canari wyverns
4. Close game
5. Restart game
6. Reopen world
7. Repeat steps 4-6

Description of issue: Male canari wyverns are only spawning in one color and upon a restart may all change to a different color.

Versions
Forge: 1.16.5-forge-36.2.35
Wyrmroost: 1.16.3-1.2.11

I am also experiencing a very similar issue. All male canari wyverns spawn in with purple markings or green markings, and all will change to green inevitably. Other players online at the same time will see green when I see purple, and vice versa, upon spawning in new wyverns.