The sale of RoundPoint Mortgage Servicing has fallen apart with the bidder walking away from the table, according to industry advisors close to the transaction. Sources indicate that Tavistock Group, the owner of the nation’s 24th largest servicer, still has an interest in finding a buyer for the servicer/lender, but for now no deal is imminent. Tavistock bills itself as an international private-equity firm with a strong interest in finance, real estate and other sectors. The firm is headquartered in the Bahamas. An advisor close to the transaction declined...