Those of us who work in the trade see this more than the OEM's would like you to believe. This problem I've encountered more than a few times on Suzuki bikes and Quads. It usually happens out of the warranty period but it does happen. The problem has been addressed with a redesigned rotor with a metal shroud encasing the magnets.I think it should be covered too. I've only seen two reports of this happening so I don't think it is a widespread problem. It's more likely so few replacements are needed, the part is not well stocked. "As Needed" or "Just in Time" parts availability is common now to avoid inventory and warehousing costs. Stators and fuel pumps are or have been on back order at times too for example.