Dang, maybe my clown was just suicidal? Amazing your starry hasn't took a leap. Do your light fade to off or shut right off. Third Coast mentioned the possiblity off lights being a factor.
I've had the clowns for several years with no jumping. Then I added a tang and it frightened the clowns and suddenly they jumped like once a day. Got rid of the tang and no more jumping.
Really depends on what else is going on in there