Demolitionist do not increase flashbangs damage

Hi,

I noticed that the Demolitionist node in the passive skill tree (Gain 4% of Damage as Extra Fire Damage for every different Grenade fired in the past 8 seconds) doesn't affect flashbangs in terms of damage. The node affects all other grenades.
In short, the flashbang grenade receives no benefits from this node, even though every other grenade receives a damage bonus.