again sir/ma'am, the screen protector and/or phone case could be interfering somewhat,. only removing these things will determine if they are the culprit or not.
even if you reach out to samsung or some tech rep at best buy, etc, they will ask you the same questions,.
although you don't think they are causing the isee, more often than not they do.
for example on the sensor ,
i have the phone set to not be able to come to life if it determines its in a bag or pocket.
i can also fool the sensor by thinking its in a bag or pocket by having something hover over that sensor--in effect blocking it--and it will turn off the AOD screen. once i remove the item that covering the sensor , the phone will come back to life.