Smile [Q]Hangout Notification

When I first switched to the stock LG G2 KK rom when using hangout and I had my screen on a little black box with a message preview would come down form the top of a screen and I could click on it to reply or it would fade away after a few seconds.

My question is I no longer have that anymore and I can figure out why, and would like to get it back it was a really nice feature. Anyone have any info regarding this?