EonRaptor

And just got server log from the vanilla server. Attached.

After watching the chicken a bit, it laid an egg, which is the problem with these non-ChickenJockey chickens spawning in caves. The Zombies are picking up the eggs.

Thank you,

EonRaptor

Johnibur-

Spun up a new fully vanilla server, attached is the F3 on a chicken showing y21 and the output of /data get entity.

This chicken has IsChickenJockey: 0b as well.

Johnibur-

Following up. Got it. Attached is the screen shot of the Entity data of the "cave chicken." The value for "isChickenJockey" is "0b"

See attached screen shots

Johnibur-

We've been having this on a Vanilla 1.17 server where I have OP. The /data Get Entity returned an error but F3 shows the entity as a Chicken. See attached screen shot.

I am running Fabric client side for REI and Voxen minimap but server is Vanilla. We've also had a large number of chickens in the Nether. 

We have players that reported seeing chickens spawning from zombie spawners. Our guess is that an error is occurring in the ChickenJockey chance and instead of spawning the jockey, its just spawning a regular chicken.