Damped Track joint not following parent

I’ve added a damped track to the feather joints of these wings to make them jiggle a bit when the wing moves. The left wing works just fine, but two of the joints on the right wing are not following the parent bone correctly. Any ideas on how to solve this?

Are the tip bones children of the damped-track bones?
That’s a setup that I’ve seen in tutorials as an automated ‘jiggle’ solution.

It produces a dependency cycle though. So the results can be a bit variable as you scrub up and down the timeline.

Yes, I’ve symmertized the bones to mirror the left wing, which works as it should, but the right wing refuses to work. I’ve tried deleting the feather bones and make new ones, all parented correctly, still doesn’t work.

Okay so I discovered that the joints break when I rename the bones? So as long as I don’t touch the names they work fine apparently.