Definitely something wrong. How long is he being caged? Leave the radio on. Is there a cat or another dog around so he does not feel isolated? How old is he? All sorts of questions.
He is insecure and anxious is the bottom line. You need to consider his needs. I've never owned a Staffie, but have had dogs life-long. If he's broken a cage then he is desperate about something. When you are around you could try caging him and watching from a hidden place. Good luck and love him.