Toxic Growth Pustule Damage not Increasing with Gem Level

Toxic Growth's Pustule's attack damage remains fixed at 42% for all gem levels instead of scaling from 42% - 100%.

Toxic Growth also doesn't appear to be getting any damage benefits from Area Damage. The damage is unchanged after linking Concentrated Effect.

I am also trying to figure this skill out. Surely it was too strong before, but if nothing increases with level right now apart from the initial arrow throw damage it's objectively just not worth using past act2.
Best cases scenario all pustules hit a target and it deals 42%*7*3 = 1008% damage per use, which is barely 3 times the damage of a single normal bow shot for a pretty big cost...

Similarly, nothing seems to scale from lvling vine arrow anymore apart from the base chaos damage which makes it hard to have any sort of use lategame for poison builds.

Bump