The probate court, upon its own motion or upon the motion of any party in interest, whenever it appears that a question of construction of a will is involved in the accounting, shall enter an order transferring the accounting to the superior court for the determination of all such questions, which shall be presented to, heard, and determined by the superior court as appeals from the probate court are presented, heard, and determined. The probate court may suspend further proceedings pending a final decision of the superior court. After a final determination of the questions of construction, the probate court shall proceed with the accounting.