Push notifications problam on flyme

I have push notifications problam on flyme
I’m new to everything related to the device and flyme features
I tried to make all the changes in security as specified in the community about other versions and it helped in partially.
After a wait of several hours still keep the messages of Whatsapp to reach.

have you tried to use an app called titanium root pro that makes you could freeze apps?
in that case you can select app security and freeze it. after that you be sure you have put the padlock in your whatsapp to keep it always running.
this way you should not have any other problem with that, but… each smartphone works similar but no equal.
tell us if your device works better or not.

Looks like your connection to Meizufans was lost, please wait while we try to reconnect.