FusionBlast interaction with Static Unlimited Power using Static Orb doesn't count correctly

I am speced into both Unlimited Power in Static and FusionBlast in Static Orb. When casting Static Orb my Static will cast Lightning Blast 2 times with a Chain count of 4 and then go back to a chain count of 3 even though FusionBlast says the next 5 Lightning Blasts. This is with the additional chances from Chain Lightning in Lightning Blast.

Player-prev.log (27.6 KB)