Only one side of rig rotates correctly

I’m trying to create a flapping animation for these wings, but for some reason I can only get one side to work.

Rig

Explorer
image_2024-12-26_191103605

Working side

Side I’m having trouble with


This side seems to rotate the middle and opposite side.

I’ve tried re-rigging it several times, I gave all the joints unique names, I added parts to the model, I moved the primary part. Not really sure what else I can do at this point.