After latest software update last week my notification panel doesn't pull all the way down anymore. Why?

[AC Question]

I used to be able to swipe it all the way down whatever else I was doing on the phone, see the message and pull it up again. Even on LockScreen. Now it simply says there is a message and I have to go in to the app. Thanks in advance!

 

[B. Diddy]

Welcome to Android Central! Which phone? Is it the stock Messaging app?