when you click inside the weapon box then double click a weapon it should equip it to your hand slot selected
however
doing this in the off hand sends the weapon to your main hand instead... only effects weapons that could be equiped in main hand so; hand axe, dagger or short sword for example but not shield [see image]


work around = people with a mouse can drag and drop the weapon into the off hand slot

this is a simple script error that basic testing would have picked up but easy to fix