I've never seen a glitch like this in the Ifrit fight.

The vast majority of Primal fights go without a hitch if you've got everything down to a science; the ones you -remember-, though, are the ones where some hilarious glitch happens. Don't assume that "Primal fights are glitchy" in a thread specifically recounting odd glitches, that's confirmation bias!

(That said I wouldn't surprise me if there -were- glitches; remember the Garuda glitch that allowed bypassing of Aerial Blast. All bets are off in general when it comes to 1.xx's coding, especially if you're doing the fight faster or differently than the people who wrote the monster AI anticipated. I've killed Ifrit /pretty/ speedily and never saw that glitch, though, so... weird.)