Gunlancer cleanse not removing Igrexion fire stacks

I don’t think this is intentional but my Shout of Purification on Gunlancer Nelassia’s Energy skill is not removing the fire debuff stacks on Igrexion’s fire stage. I’ve noticed this stage is a lot harder since the last patch.

/Bump, any response? I’ve confirmed the stacks are not being removed by the cleanse, where as they are removed by panacea potion. Is this intentional?