Originally Posted by Aerowinder
Is your other phone (you didn't say which) running KitKat? It has notification problems. Sometimes the notifications come through, but disappear immediately. Also, in KitKat, when you swipe an app from the recent list, it actually removes it from memory. Which explains why it works as long as you don't swipe it from recents.
Do these issues correspond with the problems you are having?
I do use Kitkat 4.4.2 (Sinless rom) on both the N7 and the HTC One. The exact same setup on both devices, incl EX kernel. Good to know about the swiping recents list.
I'll have to do some more testing as I don't receive WA messages all the time, but only every now and then.
Cheers for the help so far.