I have had this issue for a while and in the past just changed the action to a simple fade in and out transition... but that is less than ideal. What happens is the smart object flashes on screen in it's finish position just before the effect runs. Then the effect runs normally... but it is quite visually disconcerting. It happens in preview and in published output too. Has anyone else had this - and more importantly has anyone else found a solution to this.
Cheers,
Don