Default (Q) Air view with Hangouts

So two days ago whilst using hangouts (I use this as my default sms app) air view suddenly worked, It was showing me previews of messages, I closed the app and tried again and it worked again. Then next day I tried again and no joy, was this a bug as I don't believe air view is supposed to work hangouts, I could be wrong!

Anyone confirm this?

Sent from my SM-N9005 using Tapatalk
Current phone....

HTC One M8, Gunmetal Grey

Current tablet

Nexus 7 (2013)

Previously owned...

Samsung Note 3, Sony Xperia Z1, HTC One, Sony Xperia Z White, Samsung Galaxy Note 2 Grey (N7100), Samsung Galaxy S3 Blue (i9300), HTC One X White, HTC Desire HD, Nokia Lumia 800, Samsung Galaxy S2 (i9200), iPhone 4, iPhone 3GS, iPhone 3G.