iPhone freezes after a while

Hello,

Recently I replaced the lcd + digitizer on an iPhone 7. After a test everything works, but after a while the iPhone locks up while using: the screen freezes (still showing everything) but the digitizer doesn’t seem to be reacting.

The only thing that works is a soft reset ( power down + wake). After reboot the iPhone works again.

But the problem returns so a soft reset is needed again.

First time I’m having this issue. Is this just a faulty screen?

Google Alert – “iphone 7”