Fowler Theatre Stage Lights go off and on

Tonight while no one was in the theater, lights behind the stage go off and then back on. The camera behind the stage goes dark and stops recording and then begins recording after the lights come back on. All other cameras in the theater were checked to confirm that no one else was in the building. This occurred on the birthday of the manager who killed himself in 1968 and who attempted to take his life a year prior (and some believe backstage by hanging himself).