Left Eyebrow not responding well, no hidden path or tag issue

Hi, the left eyebrow of my puppet is somehow not responding as well as the right one. Moves just a little bit. I made sure there is no hidden or far point in my .ai in that layer nor tag issue in my character animator project ! I've been trying for hours and still don't know why. Thanks !

I can send the .ai if needed !

Thanks

Clément