Minecraft Username:
PapaDwaggy

Brief Description:
My island has a cow breeder/cooker farm, in it, I have roughly about 20 ish cows. Today, while building my sugarcane farm, I checked on the animals and the cow farm was empty.

Instructions:
-

How many times did you recreate this?:
I've had named mobs disappear on my island before. An example, an Iron Golem that I fenced up and named Bob.

Result:
Cows disappeared.

Expected Result:
Cows should be in farm.

Evidence:
I was not recording at the time but you can ask CemCrazy, I called them onto my island to see. They know I had cows in there before.