Melee skill (dual wield) disappears when I equip a crossbow in slot 2.

Specifically it worked fine until I travelled to the Freythorn but as soon as I arrived there the skill disappeared. Having done what limited testing I can it seems fine with a 2 handed melee weapon in the second slot or a bow but if I equip a quiver in the off hand of slot 2 the dual wield skill also vanishes.

It hasn't removed access to my other melee skills just the basic melee option.

Ok solved my own problem I had too many support gems for my dex (I assume I swapped a piece of gear and lost some dex). Removing the gem caused the missing skill to reappear.

It would be nice if a clear warning about this conflict could be added so less observant people like me can not bother you fine folks with self inflicted problems :D.