No messaging notification while using app since KitKat update

I've beaten most of the issues I've had since the KitKat update a couple weeks ago but I still can't seem to fix this. If I'm not using my messaging app I get sound and vibration notifications when a new text message comes in. But if I'm actually in the messaging app in a converstaion I get none. I can see messages coming in if I'm looking at the screen but no sound or vibration. If another contact sends a message I get the notification and can switch over but I get nothing during an active text. Sounds like some kind of silly new "feature" but I actually want to hear a tone play or get a vibration if I put the phone down to look up at something and the person replies back before the phone goes to sleep 3 minutes later.