It probably because she doesn’t see a point in being a world she doesn’t understand and where the people she once knew aren’t there. She probably finds the lamp more comforting, after all once you get used to being alone it’s easier to stay that way.
Er thats how i felt when i was left all alone. Strangers are the one you'll encounter everyday. I know the word "be brave" is always the counter for this type of arguement but i guess you could give her a time she just got out after so many years imagine your family was with you and the next day they will be suddenly gone. so i guess its a natural reaction to run away to the reality . But as i see as time goes by she will love it. The world outside the lamp
I can kind of understand her, the lamp is a comfort in a world where frankly you do not care about or have nothing you care about. Waking up for a few days? No problem, its a strange world anyways. Treat it like you just worked a little bit and then sleep. When she had a body she had already seen the world. It just makes sense to me that to her there's no value in living in a world where there's nothing she feels attached to is.
Why on earth does she want to return to the lamp? That isn’t living. It’s going to sleep, waking up for a day, and then going to sleep for hundreds of years and be basically a prisoner to whoever wakes you. She should be trying to figure out how to break out of the lamp. Wtf.