If you have the Auto restart on, if your phone restarts during the night, it will default to your ringtone until you unlock your phone to "finish the restart". After that your chosen alarm will sound. My Note 10+ is set up just like my Note 8, but it got me!! Scared the **** out of me this morning!! I'm used to a nice, calm, tranquil awakaning...and then BOOM...gangsta rap at 6:25am!!!
So, turn off auto-restart or have it do it during the day while you're awake.
So, turn off auto-restart or have it do it during the day while you're awake.