Robot misses one of the component when placing it for the 3rd time


I am facing an issue during a robot release component,
The problem is the robot releases 1st two components(3items together - see picture) but the third time it releases only 2 items misses the 3rd one as shown below

These are setting in the component properties of the robot

Can someone tell me where i am making the mistake

also point to be noted is the three item which u see in the 1st screenshot are placed together one by one by different robots at different stations so basically the 1st picture is of the 4th station
see below screenshot which shows the layout