Imbue weapon: "Infuse your weapon with power, causing your next Light Attack used within 2 seconds to deal an additional 2090 Physical Damage."
So the sentence implies that it IS your light attack that deals 2090 damage more than its base value and weapons expert should buff your light attack damage by 15%. When you test it, the additional damage does not get empowered by the CP.
I believe this is a bug because without it i can not think of a single reason why would anyone use that CP slottable since it will only provide a 2-3% damage buff in pve.
I am asking for a fix so it can increase your overall dps in a 7-8% range like most other blue slottables do when you use it with imbue weapon morphs.