Update repeat - force refresh

I am using FullCalendar for a booking system which has some Javascript functions triggered on date select to create events. This process also produces an array of JS objects which I use dmx.app.set() to assign to a variable that a repeat children div can see - they can then be processed as part of a SC form. This all works fine except that when the array is updated by the FullCalendar javascript function, the repeat region is only updated when the screen is scrolled. Is there a way of forcing the repeat to look at the variable again and update?