I have tried everything, all notifications are set to on, have changed all notifications individualy for differnt tones, do not disturb is off as well as set to still receive if it was on. I use this for my job and it is a real problem!
I would recommend testing your device in safe mode to see if your symptoms persist. you can do so by following these steps.
Press and hold the power button until power off, restart, and emergency mode show on the screen
Tap and hold on the power off option until it changes to safe mode, then tap on safe mode
The phone will then reboot into safe mode. You will be able to check that it is by a grey transparent box in the bottom left of the screen that says safe mode.
Let me know how this performs while in safe mode.