[Grandpa]

I've tested multiple different ways. Win or lose, it stays. I first encountered the glitch after I fought a wyverntouched Evoker/verglas, then to test again I fought an MG/Evoker. I was beaten via ice and it remained. I was beaten by a bullet and it remained again.

But yes, I think the problem is just with status ailments in general. Though I've never started a battle with poison/burn still active after being beaten by it or before the infliction counter ends. The icons representing poison and such do remain under your character portrait, however.