I have auto restart scheduled in device care and noticed that every time my phone restarts, the notification sound will be set to mute while everything else is unchanged. This seems to only happen with auto restart since I don't see this issue when doing a manual restart. What could be the cause of this issue?
Does this issue still perform the same way when your phone is in safe mode?
Yes. I had my phone in safe mode and the auto-restart process completed (once restart was finished, the phone was no longer in safe mode) to which I find the notification sound muted. Here's a picture.
Have you checked to ensure that you do not have the Do Not Disturb option on? To check this just perform the following?
From a Home screen, swipe up or down from the center of the display to access the apps screen.
Note These instructions only apply to Standard mode and the default Home screen layout.
Navigate: Settings Settings icon > Notifications.
Tap Do not disturb.
Tap the Turn on now switch to turn on Switch on icon or off Switch off icon.
Tap Turn on as scheduled to turn on or off.
Note To add a new schedule, tap the Plus icon then perform the following steps:
If turning on:
Tap the default schedule (e.g., Sleeping) or enter a new schedule name.
Note To edit the schedule name:
Tap the current schedule name.
Enter the preferred name (e.g., Work, Gym, etc.).
Select the preferred day(s).
Note Selected when a circle is present.
Tap Set Schedule.
Tap Start time and adjust the start time then tap Done.
Tap End time and adjust the end time then tap Done.
Tap the left arrow icon Left arrow icon (upper-left) to return to the previous screen.
Tap Allow exceptions.
Select one of the following:
Tap the left arrow icon to return to the previous screen.
Tap Hide notifications then the preferred notification setting to turn on or off.