So this has happened to me on more than one occasion where i'm animating with a rig and all of the sudden one of the controls like the main arm/shoulder controls just stop following the shoulder when i move the clavical. Here's the most recent example.

as you can see in the first pic which is the rig fil it works fine. And up to a certain point in the file i'm animating it it worked fine as well until for some reason at some point pic 2 happened where you can see that the shoulder control is clearly disconnected.

Has anyone run into this before and know how to prevent it?