I've actually had the same, I doubt it's a bug. It's the banters you can pipe in on, the first I had was in the prologue when Solas asks about you being dalish. I was still reading the options when it cut me off and he said something along the lines of "Silence, then? Very well."
Reloaded to get the chance to actually reply, but it's made me paranoid about answering quickly in the banter-style conversations. 
Edit: Was supposed to reply to coldwetn0se but seems my formatting is borked.
THAT'S IT! THAT was the one that I first got as well, and I missed it for the same reasons. Hell, it took me nearly two seconds just for my blasted eyes to focus on the text, then I start reading and *poof!* Gone.

I didn't reload, since I was unsure if it would repeat. Dammit!! I should have reloaded. LOL! Curse my self.

Well, unless they decide to extend the amount of time, it is on the screen, I think I will be SOL. /head-desk. *chuckle*
Nutz.