Capacitive button shorting, fix or replace?

So my phone randomly decided to start thinking I pressed the back button when I didn't on Saturday and now it works for a bit and then it will happen many times a minute for a few minutes and then be fine again. I have do idea why it started happening as I didn't drop the phone or any of the usual damage-causing things, just using it like normal.

I'm assuming this is probably due to the ribbon cable for the button getting damaged (somehow?) and the only way to fix it is to replace but I wanted a second opinion on the issue.

I'm also not sure how to glue the display frame back after I replace it and I didn't see any tutorials for that.

So if anyone can chip in a confirmation or other solution that'd be great! Model number SM-G920V

Thanks!