Notwithstanding s. 40.02 (40), for the purpose of group health insurance coverage offered by the group insurance board under subch. IV of ch. 40, if an employee who was on a leave of absence returns from leave, even if the employee has not resumed active performance of duty for 30 consecutive calendar days on March 12, 2020, due to the public health emergency declared by executive order 72, the leave of absence is deemed ended or interrupted on that date.