My Rhode Island brown egg laying chickens have the same "issue"... I feed them 1/4 feed from store (consisting of corn, soy and typical stuff) and the rest is cooked brown rice, flour, and veggie/seafood scraps.
All their eggs always taste like this for the past year... I'm hoping it is the...
Hens go broody when you don’t want them to… and won’t go broody when you do.