Harvey's self injurious behaviour has been documented on her early shows, so sadly for him this isn't a new thing, its not a coping mechanism like self harm, more a part of his condition.
KP has also documented the damage Harvey causes to his/her property/properties, thankfully prior to "Harvey and me" she has only ever shown the damage and not filmed it happening.
Unfortunately this behaviour isn't unique and can be difficult to manage. I think her language around this behaviour is the most interesting part, she knows the warning signs like any carer would but she doesn't have the skills to diffuse the situation.
In fact I would say that her language leads to further escalations, just an observation from watching her interact with him.