Chicken drops 2 raw chickens when killed with looting 3 sword

Chickens drop 2 raw chickens when killed with a looting 3 sword.

 

Steps to reproduce

1. Enchant the sword with Looting 3

2. Kill the chicken

3. Sometimes chicken will drop 2 raw chicken instead of 1.

(enchant fire aspect for 2 cooked chickens)

What we expect to happen

Chicken should drop only 1 chicken meat instead of 2.