I'm not sure if this is a bug or is intended but ever since the recent raids patch you can no longer evade through the fire in LC with any means of consistency. If you do use evade through the fire you will still take damage even though you don't get the little damage taken sound. This is what makes me think it's a bug rather than an intended feature.
At any rate I think how it was before being able to evade through was a much better system since it rewarded some level of skill of being able to time the roll properly. Now there's no way to cross speedily without taking damage and wasting your pots. Instead you have to waste time waiting for the fire to go out each time.
