A faulty breaker is seldom the only cause of a hot ground reversal. This type of problem usually implies a loose or damaged neutral wire in the circuit. However, in rare circumstances, a failed breaker may play a role. If the breaker fails and allows too much current to flow, it may damage the neutral wire. This may result in a hot ground reverse. However, this is quite rare. If you suspect you have a hot ground reverse scenario, contact a professional electrician so they can determine the cause and ensure everything is safe.