Why on my lock screen does it say email content hidden but when I open it there is no email

[AC Question]

When I unlock the screen to email goes away so why is it on there to start with

 

[the tall guy]

Hi, did this notification eventually disappear? did you turn your phone on and off?

 

[B. Diddy]

Welcome to Android Central! Are you saying that when you open your Email app, it doesn't show any new emails?