I have been having an issue with notifications the past couple of weeks with Notifications on the lock screen.
I get a notifications from various apps and they normally stay in the lock screen/tray until I swipe them aside, or click to open them, as of recently I get a vibration, LED alert that I have got a notification but when I pick up the phone and check the notifications on the lock screen for a quick glance, they'll appear but as soon as I try to view them on the lock screen tray, they will disappear almost immediately.
I have tried reading various sites and suggestions but all unsuccessful. It doesn't appear to be power settings, cache issues nor any specific app (as it is doing this for; 90min, outlook, gmail, mygalaxy, googleplay store, device and settings alerts etc'
Any help would be greatly appreciated!