Why is it since my phone updated to lollipop do I recieve NO alerts or notifications?

[AC Question]

Before my phone updated to Lollipop I would reciece notifications from Twitter, Palringo, Kik etc whenever I recieved a msg or notification. Now nothing. Apart from calls & the net it is useless. NOTHING works notification wise. I am using a Moto G Motorolla.

 

[B. Diddy]

Welcome to Android Central! Are you just not getting an audio notification, or is there also nothing showing up in the notification bar? Is it only while the phone is off, or even while you're using the phone?