Puerto Rico is facing a fresh round of creditor lawsuits after a temporary reprieve on litigation was lifted, exposing the distressed Caribbean island to the consequences of the defaults on much of its $70 billion of debt. Hedge funds holding $1.4 billion of general-obligation bonds sold in 2014, including Aurelius Capital Management and Monarch Alternative Capital, sued the commonwealth in New York state court in Manhattan, seeking payment on overdue principal and interest. Insurer Ambac Financial Group Inc. and funds that own sales-tax backed bonds sued in the U.S. District Court of San Juan in an effort to block the...