Missile damage not showing or non-existent?

I've noticed this for a while now, but finally decided to post about it.  Several times I've got the 20% damage increase for missiles with the colorful plastic balls on my gadget; but when I equip it, there's no indication that it has any effect at all.  The damage value of the missiles remains exactly the same whether the refined gadget is equipped or not, and when I look at the damage values on the "strength" value, again, the damage value of the missiles remains unchanged whether the gadget is equipped or not.  There's no indication whatsoever that equipping the refined gadget has any actual effect on the damage inflicted by the equipped missiles.  Am I missing something?  I usually have the rivet refinement equipped, so it hasn't necessarily made any difference, but it just bugs me that the plastic balls refinement seems to have no actual value at all.  

I get the same impression. I also think that refinements that reduce the chance of critical damage from the opponent, as well as stuns, do not work as they should. In addition, the refinement that reduces weapon damage is also not satisfactory.

In my opinion, the developers of the game should still improve it, so that these refinements are finally what they should be.