If you’re able to get another replacement screen, it could be the first replacement one is faulty. Happened to me once, boot looped and tried a second screen and it was fine. Same original flex cable and home button.
Recently, I replaced a friend's iPhone 7 Plus prior to the release of iOS 11. He broke the replacement aftermarket screen & he gave me the phone with iOS 11.0.1 on it! Replacement broken screen touch works fine & I've just replaced it again for another new aftermarket screen; everything works fine! I have photos of the rear of the original Apple screen as well as the two replacements screens. All the chips have digits printed on them. Edit: this is the chip on the replacement screens with the digits printed on them https://static1.squarespace.com/static/5...
I hope this can shed some light on the issue. I replaced a friend's iPhone 7+ before iOS 11 was released. He broke it again (the aftermarket screen I fitted) and he gave me the phone with iOS 11.0.1 on it! Replacement broken screen touch works fine and I've just replaced it again for another new aftermarket screen; everything works fine! I've taken photos of the rear of his original Apple screen as well as the two replacements screens. All the chips have digits printed on them. Update (10/08/2017): Ah, so this is the chip I have photos of, with the digits. The thinner silver chip is blank... https://static1.squarespace.com/static/5...