I have several that would just as soon stay in their cage, some will take a quick run around and go back and some hate to go back.
All are different.
If it's a change in her behaviour than it could be cause for worry unless she does indeed like her new toys so much she doesn't want to leave.
I would try putting her dust bath on the floor and get her used to it being there.
Let her get in it and then put it on the floor to get her started.
If shes like her dust bath she may come out for it.
If there is something wrong she may not bother.
Or you could take the wheel out and attach it out side to see what she does.
You know her best, does she do everything else she used to do? Is she using the wheel still? Is she eating the same & how are her droppings?
If nothing else has changed try not to worry, if she seems just way more laid back it could be signs of a problem.
Check her teeth, put her up to your ear and listen for breathing problems, take a good look at her droppings for changes,make sure she is peeing OK, & take note she is behaving normally.
She could be just a spoiled little chinny