Has anything changed in your household lately? Something that could be causing anxiety for Butterscotch? Many rabbits don’t like being confined in a cage or hutch, especially if they don’t get a lot of out of cage time for play and exercise each day. The fact that there are loose screws and splintered wood sounds dangerous. You certainly don’t want her to be ingesting either of those. Do you have an x-pen or something else that you could keep her in that might be safer?
Rabbits really do need plenty of out of cage time every day, and any enclosure they are in when they are penned up needs to be large enough for them to be able to run around and stand up and not feel so confined.
As has already been suggested, you need to make sure that Butterscotch isn’t having any physical problems, that might have caused this change in behavior. Make sure that she is getting plenty of out of cage time, and look into getting some kind of pen that would be less dangerous (no screws or wood that could be chewed and splintered).