Assembly does not move as intended

Hi all,

I am facing a problem while performing pick n place i am using two robot to pick and place 6 componets (3 per robot) in a box have programmed both the robots same way but one of the robot which pick n places the 3 components does not move with the box instead it just freezes there whereas the other 3 components placed by the other robot move with the box.
I checked with gravity direction as well both robot have same settings
Please let me know what could be the Problem ?

Can you share the layout or screenshot?