Potentially all concoction skills scale with increased damage with bow skills stat on quiver

I was trying to buy a new quiver for my Poisonous Concoction build since I thought damage with bow skills did not help for the damage.

To my surprise the poison damage with my old quiver:

48% increased Damage with Bow Skills
+168 to Accuracy Rating
37% increased Projectile Speed
+2 to Level of all Projectile Skills
+30 to Dexterity
21% chance to Pierce an Enemy

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Was lower than with my new quiver:

Adds 10 to 13 Physical Damage to Attacks
+265 to Accuracy Rating
39% increased Projectile Speed
+2 to Level of all Projectile Skills
14% increased Attack Speed
+30 to Dexterity
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The difference was about 50% less dps going from 20-30k to 13-20k poison dps. I tested some different quivers with and without %inc damage with bow skills and it seems that the stat contributes to the Poisonous Concoction damage.

I assume this is not intended but it will drastically lower the damage of any concoction skills when fixed since the current best way to scale is using widowhail and quiver which boosts this value to about 150-200% inc damage.

Pathfinder with Widowhail and Poisonous Concoction. I was very surprised to find the same thing today.

Bought a new quiver, noticed the damage downgrade on the tooltip. After testing with a bunch of random quivers, concluded that "% increased Damage with Bow Skills" is to blame.

It seems strange that an unarmed skill is scaling with bow skill damage, so this is probably not intended. Must be confusing for some players - I'm sure someone out there is wondering why their build is worse by ~30% dps for no obvious reason.

It seems odd a quiver would do anything to concoction let alone a bow damage affix.

Unfortunately without the scaling from widowhail and a quiver concoction damage would be pathetic.

So maybe its intended?

I was leveling with totem and switched to concoction... it does a miserable amount of damage compared to where I had totem at. (lvl 26 with +8 on two weapons and +2 on gloves / amulet)

compared to a level 16 concoction (can only get +2 on neck right away)

My first impression was that the concoctions were trash even after getting buffed. I was planning on using a shield with it, but it seems doing so would make me lose something like 80% damage.

So what does "% increased Damage with Bow Skills" actually do? Does it increase the amount of damage on skills like Lightning Rod, or Lightning Arrow etc?