Fireflower Solar Amuliet - Take fire damage on Igntite *refresh*?

Fireflower Solar Amulet:

<other stuff>
* +[1-4] to Level of All Fire Skills
* Take [100-100] Fire Damage when you Ignite an Enemy

Does anyone know if the "take fire damage when you ignite an enemy" is supposed to proc when you refresh ignite on an already ignited enemy, or is this a bug?

I'm trying to use it on a character with high Flammability Magnitude but the problem is Incinerate inflicts and then refreshes ignite almost constantly, and this makes Fireflower's Fire Damage on Ignite trigger almost constantly, making it unusable as I blow myself up.

Is this as designed or should I open a bug report?

I would assume this is intended since you are igniting at a consistent rate. You'll probably have to dig in and find a way around the consistent damage you are getting.