Touch Id not working when screen is placed, but works while it's open.

Vague title, I know. Iphone 6s: Just did a screen replacement on a friend’s 6s, everything normal, took good care, used correct tools, home button works fine, but touch Id doesn’t. Tried everything but couldn’t get the %#*@ thing to work (no notification on phone saying touch id needed repairs), decided to lift the screen and to my surpise, touch id only works while the screen is lifted from the case, the moment I try to shut the phone closed it doesn’t work anymore. Any ideas? tried to losen some screws and protectors, also took screen apart (back panel, flex cable, home button) then install again but didn’t work.

Thinking on trying a new screen, any suggestions?

Problem solved, it was the screen I was using, changed that and worked like a charm.