Dynamo's Kinetic Pulse "30% more weapon damage" doesn't apply to melee

[A Bear]

Usually Weapon Damage applies to melee, where Bullet Damage only applies to your gun. Dynamo's upgraded Kinetic Pulse says "30% more weapon damage to hit enemies" but only applies to the gun rather than melee attacks.

Video attached

 

[Time-Girl™]

Checked all the other abilities with that wording out of curiosity, and there's one other outlier:

• Level 3 of Dynamos's Kinetic Pulse: Does not Work
• Level 2 of Lash's Grapple: Works
• Level 4 of Pocket's Flying Cloak: Works
• Level 4 of Yamato's Flying Strike: Works
• Level 3 of Grey Talon's Rain of Arrows: Works
• Level 4 of Haze's Fixation: Does not Work

Items where Weapon Damage is a conditional bonus all seem to work.

(Also checked all +Bullet Damage abilities I could think of to see if the opposite problem exists with some of them, but as far as I tested they all correctly only apply to the actual bullets and not melee attacks.)