Gmail notifications disappear immediately from bar

[AC Question]

Samsung S5 Android 6.0.1 APEX launcher

If screen is off I get the notification sound but when opening phone nothing is in the bar.
Notification history shows that the notification arrived and was cancelled
App icon badge shows new email.
When screen is on notification appears in bar then immediately disappears.

Not sure when this started but would like to know how to stop it

regards
John

 

[the tall guy]

Hi, can you disable the launcher and see if the problem persists? that way you know if it's a phone issue or Apex Launcher issue.