How to lately group some objects with assembly container?

[ceremcem]

At this moment I decided to put rpi and socket-cut into the same assembly container so that I can move both rpi and the socket-cut at the same time. But when I try to put them in a container at this moment, I think the Binder's synchronization is broken:

[realthunder]

Simply select both socket-cut and binder, and then click PartDesign SubShapeBinder button again to update the reference.

[ceremcem]

Thanks!