Barrage Dualstring Bow not compatible

As it is never mentioned anywhere that the Barrage skill should not work with a Dualstring Bow, it strikes me as a bug that when I equip a Dualstring bow, the Barrage Skill is removed from my skillbar and can no longer be used.

Not sure if this was fixed or you have some other issue, as Barrage does not get disabled for me with a Dualstring Bow. Been using both in tandem for a while now.

Maybe it was an attribute (dex) requirement issue? But then again that would disable all your bow skills...