Why LUMEN RT does not refresh the IModel

I have started a scene in lumen rt using an I model loaded from synchro  where I have  putting some trees and population and traffic . 

I have recently make changes to my synchro model today and after reloading the I model in synchro control where I can see all the changes and the updated sequence , then I go ahead and open the same scene in lumen by is still reading the old IMoDel from yesterday !??

inside the scene in lumen I go to impede and try to reload the latest and it still have the date from yesterday 

any tip here is there something I am missing ??? 

thank you all