I have the same thing happening, also with an Easter Egger! I got three hens, they are about a year old. I've had them about a month. The previous owner was moving, and the hens were free ranging and laying eggs in hidden nests for a few months, so it's unknown exactly when this issue started. One of the chickens lays a bright blue egg, another lays a brown egg, and one hadn't been laying ANY eggs. Previously, she had been laying cream colored eggs per the previous owner. I figured it was possible that this hen was just taking longer than her friends to settle in (the other two took no time off after they moved, and I'm getting 6-7 eggs a week from each)...except that Miss No Eggs is also crowing, AND facing off with roosters in adjoining pens through the fence! She is big and shiny and healthy looking, she eats and drinks and acts normally, just like a rooster.
She has bigger, redder, wattles than the other two hens, as well as a bigger comb, but I don't have any pictures of her from before, so I don't know if those are normal for her.
Sigh. Not sure what to do with her...