touch ID works after screen replacement but only for a few clicks

hello, recently I replaced a broken screen out of my iphone 6S, i carefully installed everything back im place and everything worked just fine, but suddenly, the touch ID stopped working, no message like “TouchID od dissabled” to anything, homebutton still works.. Then I took it apart again, reinstalled both touch ID connectors one the homebutton and into the motherboard, it worked again but for like 20 unlocks and then the same problem occured… This was repeat like 6 times and same results.. I’m hopeless, should I get a new screen or is there anyone who can help? Thanks.