The description of the khepri sting exotic changes according to the the 7.0.0.1 patch notes: "...Additionally, when you have an undetonated smoke bomb on the battlefield and have not been made invisible [b]by a smoke bomb,[/b] you gain significantly increased melee energy generation." However, in-game going invisible AT ALL (dodge OR smoke) halts the regen. Even if you make the argument that this is more fair since you could still use it to make everyone invisible and get regen by smoking allies and then dodging for yourself, I say that you should be able to dodge invis if you don't have trappers ambush on (the one that lets smoke make you invis) without losing the regen.