A group of rabbits is called a bury or a herd. Over time, rabbits get used to the sounds around them, and they cease to bother them at all, but if the owner decides to play a trick on his beast and stealthily creeps up to the cage, rustling on the floor, then the rabbits are triggered by natural instincts.
Worry should not be about how long your rabbit sleeps or why it never sleeps, but about how its being in your apartment or house is safe.
Do rabbits sleep at night? Rabbits are very sensitive to the slightest rustles and sounds, so they often sleep when the owners do not have a home. They have plenty of daylight time to fully sleep.
Rabbits sleep slightly with their eyes slightly opened. Very rarely anyone can observe how their eyes are completely closed. How do rabbits sleep in the wild? They find loose and dry soil, and dig deep holes in which they sleep, try to hide from predators, and also grow offspring.