Why do you need to extend the home button flex, it’s already long enough to plug it in. This a very hard thing to do. I have replaced a cable on a home button that has been ripped following Rewa Labs on YouTube. It’s very hard and very time consuming. I would not recommend doing this unless absolutely necessary.

The charge port connector sits very close to the battery connector, I would check to see if you accidentally lifted it up a bit. If that’s not it, I’m not exactly sure what could have happened if you only replaced the home button.

So I work at a phone repair shop and went to replace the screen on my iPhone 7 today, and i accidentally grabbed an iPhone 8 screen. To my surprise it works, i don’t see any difference but i’m going to switch it out just to be safe. True tone doesn’t work either ;(