Through my testing (sadly not as much as I would have liked) I had a similar situation but managed to get the right option :D must have got lucky :D will definitely take a look at your game :)
I was aiming for the A.I to try and hinder your progression as much as possible without stopping the game from being fun, it is also their to trick you into going the wrong way and occasionally changing the controls around on you.
I see what you mean, its because the collider and particle effect start back at the same time (collider is fully back before the flames get to you) will aim to fix that, thanks for the feedback.