On /store/apparelGifts/barware, there is a link to the section for Paizo barware, purportedly /store/apparelGifts/barware/paizoBarware. However, clicking on this link simply reloads the main barware page.
This appears to not be intermittent and has repro'ed 100% of the time for me.
If, however, you instead navigate to /store/exclusives/apparelGifts/barware, which by definition should show exactly the same items as would be shown on paizoBarware, that route does work and the items are displayed.