I gave the chicken in my house (29 lower valley hollow) an egg to incubate, and waited for several minutes for it to incubate it. After waiting several minutes I left to explore the world, checked back after a few hours, and it was still incubating it. After checking several times, several hours, and several tests, it is still incubating it. Is this a bug, or am I missing something about incubating eggs with chickens?