WHY AM I NOT GETTING PUSH ALERTS ?
I'm answering my own question here, as no one else could help.
The Battery Optimization setting effectively stops ALL push-type alerts after the phone has been dormant for a while. Hence you pick up the phone to find a stack of emails etc, notifications as soon as you wake it up.
Solution: go to the battery optimization function and either turn it off, or de-optimize all the apps that need to get notifications in real-time.
Simples once you know ... but hard to find the answer.
WHY AM I NOT GETTING PUSH ALERTS ?
I'm answering my own question here, as no one else could help.
The Battery Optimization setting effectively stops ALL push-type alerts after the phone has been dormant for a while. Hence you pick up the phone to find a stack of emails etc, notifications as soon as you wake it up.
Solution: go to the battery optimization function and either turn it off, or de-optimize all the apps that need to get notifications in real-time.
Simples once you know ... but hard to find the answer.