Help with troubleshooting a DS4

I recently replaced the button control circuit film pad ribbon thing (also, what is the actual term for this piece?) and everything was working fine until now the R2 button won’t register. I tried swapping the rubber pad from the L2 to see if that was the problem but it still won’t work. L2 works fine. Did I just get a bad part or is there some sort of fix for this? I appreciate any insight. Thanks.

Edit: I just put the controller back together and now the R2 registers whenever I swing the camera around with the right analog stick. Whattheactualfuck.