Guild Wars 2

When previewing skins for off-hand weapons they appear in the main hand slot and replace the weapon there. For instance sword/focus will starts out showing both items I have equipped, but when I click on a different focus skin the focus moves to the main hand slot and the sword disappears. Clicking a different sword skin shows it in the main hand slot while the off-hand remains empty.

I’m having the same problem. I can’t switch to my one handed weapons from my LB, to reskin them.
Even if I swap weapons, it still stuck on my LB.

Figured it out, I had to click on the actual offhand weapon for it to show the skins.