Brand new note 10+, received last week.
Performed all updates, then factory reset before setting up( 5-6 updates behind)
Currently running software with March security
Long press of do not disturb in notification panel come up with either an immediate return to home screen or an error message stating settings has stopped.
Tried so far
clear cache partition
clear settings cache
All no change
Solved! Go to Solution.
Try Clearing the cache on all apps
settings - apps - click on app - Click on Storage and clear cache
If this doesn't work id try backing up your data and factory resetting your device.
Figured it out.
This just worked for me
settings, general management, reset, reset accessibility, reset all settings
You lose wifi passwords etc but not a factory reset