Do they sleep more when growing?

I've had my tamagotchi for maybe 5 days now, it has been waking around 9am. Today it was sleeping, then suddenly the lights were on, but it was still sleeping and needed attention attention the lights to be turned off.. but it def looked different than yesterday. Couldn't tell entirely cuz it was in its bed.. and it's still sleeping now a half hour after it normally wakes. Is this normal when it reaches the adult form?