Android 6.0.1 Push notifications not working

[AC Question]

After upgrading Samsung S6 to 6.0.1. i'm not receiving push notifications from gmail,whatsapp applications.
I have tried to disable "battery optimize" mode for these two apps but no luck.

I receive push notifications only when I enter into these two apps.

 

[the tall guy]

Hi, make sure you have sync enabled for both as this can prevent them from pushing notifications. Settings > accounts > Google

 

[Zandarr]

I asked the same question in a previous post. I finally called Samsung and they told me that there is a problem and to take it to a Best Buy and go to their Samsung Kiosk for a systems refresh and that should take care of the problem. I should add that a Samsung techie took control of my S7 and did every thing to ensure the phone was set to receive the push notifications so no recommendations on this website worked for my problem

 

[Zandarr]

Just left Best Buy. The aren't allowed to fix the problem. New phone should be here today or tomorrow.

 

[anon(632115)]

Email sync or lack of it is widespread. I don't know of a solution yet

 

[buddy007]

i have the same exact issue, and this persists to all third part apps. I am on xiaomi redmi note 3 qualcomm, MIUI 8 based on marshmallow 6.0.1.