If, prior to the time of hearing on a petition for the appointment of a guardian or a conservator, a petition is filed under the provisions of section 633.556 , 633.557 , or 633.591 , the court shall combine the hearings on the petitions and determine who shall be appointed guardian or conservator. The petitions shall be triable to the court. [C66, 71, 73, 75, 77, 79, §633.635; C81, §633.634 ] 2019 Acts, ch 57, §30, 43, 44 ; 2020 Acts, ch 1062, §69