IKControl not working all of a sudden

I’m working on hands for my vr game, and I got the right hand completed with IKControls. It worked for fingers and everything. But after I started on the left hand, it stopped working all of a sudden. I undid the left hand, but the IKControls still didn’t work. I tried resetting every but to no avail, it still didn’t work.

My hands are conjoined in one mesh and are fully rigged:
image

IKControl settings example:
image

Bones (shouldn’t have any effect):
image

Please help!