Physics handle not grabbing certain bones?

As title says, I’m having problems attaching a physics handle to certain bones. As I print out the hit result with the bone name, I know the skeletal mesh is getting hit properly, and it is finding the closest bone properly. But it refuses to grab certain bones.

As far as I can tell so far these include (on a humanoid skeleton) the head joint, the shoulders, the forearms as well as one of the spinal joints.

Anyone know why this is happening?

Should note that between the shoulder and the forearm there is an upper arm. Grabbing that is fine. As well as grabbing the hand.

And about 5 minutes after posting my question, after staring at this for hours, I figured it out.

The affected bones did not have specific physics assets attached to them… Ie, there was nothing to grab, though it found the bone it couldn’t hang onto it. Doh, doh and doubledoh.