Broken Sigil interaction on Spark sorc.

There is currently a bug where after casting sigil, you get the initial 15% buff, but dont receive the other 3. Also, the effects of the initial buff persist after leaving the sigil radius until sigil is casted again. Once you cast sigil again, it drops to the initial prebuffed value, then repeats the cycle after the first cast.

I have noticed some things in the skill tooltips that may be useful. after weapon swapping to staff to cast sigil, it applies the ability "punch" but it is unusable. I am not sure if there is a strange interaction because the item casting sigil is no longer active after i begin casting? not entirely sure.

Thoughts?

EDIT/UPDATE
Upon further inspection I have found that it is ONLY a tooltip bug, once you open the damage panel of spark, it shows correct application of damage modifiers.