I can replicate it every single time now. Has been popping and snapping since day one. Got it on release day and am getting sick of this. It does it all the time regardless of what I'm doing or which app I use.
Here is how I replicate it. I always have voice over switched on anyway so this is what I do. Triple press the home button to turn off voice-over. Then try to enter text and press the microphone for audio input on the keyboard.