Charged dash final wave doesn't apply damage increase to ignite?

Damage while fully channelled is 250% (150% more), and damage of the final wave should be .75*15, which is 1125%, so the damage of the final wave ignite should be doing 4.5x damage. It seems to be doing about the same amount of damage in both cases.

Test video:
https://www.youtube.com/watch?v=-RZpIxptNg8

The test video isn't a very clean experiment due to Pendulum of Destruction and lightning damage variance, but the damage multiplier should be high enough that these should be non-factors.

(As a side note, ignite does seem to scale properly off of the 150% more damage when fully channelled.)

Damnit I was really hoping this would work..,.