I've been having problems with wireless charging. I had to open up the holes on the phone to ensure constant contact with the cover.
Now, I'm getting random lockups when I place or remove the phone from the charger. While charging, the clock and flashing battery charge indicator will be displayed. I can double tap the screen and move around the phone. I'll let it re-lock and remove it from the charger. Now the phone is stuck with the glance screen on and there is no response from any button or screen tap. After a minute or so, the phone reboots. I'll get the same thing when putting the phone on the charger. I finish using my phone, lock the screen and place it on the charger. The clock is stuck on the screen, I don't get a charging notification and the phone becomes non-responsive. It will reboot after a minute or two.
It doesn't happen every time, but it does happen enough to make it annoying.