I put my phone on the wireless charger at night. When it hits full charge, the phone lights up (and the whole room as well) and stays on until I turn it off, then it goes back to the AOD clock I've set. My 9+ did it, too. What am I doing wrong? I worry that it's hard on the screen and the phone actually feels a little warm. My s8 would do that would light up after charging was complete, but would turn the screen off after about 30 seconds.