Wonderful!
It suggests she was territorial about the old hutch, perhaps partly because she was short of space. The main thing now is to discourage her from becoming territorial about the new one. Tricky to do. Make sure you are in there lots with your hands, maybe rearrange things a bit, so no part of it becomes exclusively hers in her mind.
Has she been spayed? If not, that is your next priority, both for health reasons (cuts risk of womb cancer dramatically) and because hormonal behaviour can get out of hand in unspayed females from 6 months-ish onwards.
And she almost certainly would be happier and 'easier' if she has a bunny buddy - probably best of all a neutered male - maybe one from a rescue, well-handles with a known calm temparament.
Our first bun Marble was very much like yours, and she taught us loads. She became SO much easier when we rescued Bunster - instant love and happiness.
Lots of luck with your happier bun!
