Home button intermittently working

Had a broken screen replacement done recently by a 3rd party about a month or so ago and now the home button works intermittently. I have to click it a bunch of times before it registers.

The home button itself clicks fine and is very responsive so I don't see a problem there. I took the phone apart and carefully removed the home button, ensured everything was clean. The cable looks fine, as does everything else. I reseated it, ensured it was in tight, ensured the screws were in tight and put everything back together. Still no change.

Close up of the button while disconnected:

Any ideas what to check next?

I took the back off. I wonder if this could be the issue (small kink in cable)?

Replaced the back plate with a brand new one, was careful to ensure the flex cables were fine.

Home button still doesn't work, at least works if I press real hard about 3-4 times then it registers.

Any other thoughts on what to do next?