BlazeGuard Fire Rated Sheathing

Has anyone experienced any breakdown in BlazeGuard fire rated sheathing, or have any information on the product as far as any known problems with the product? I’ve attached a photo of the same type condition found in a townhouse attic of an inspection I performed, that shows definite breakdown. I’ve seen this stuff plenty times before, but never with any breakdown. My guess is it’s part of the same ventilation problem that was also noted while in the attic. Any feedback will be greatly appreciated. Thanks!