"page.header.title" tooltip when mouse hovers on item in snipcart category page

[kees-closed]

When the mouse hovers above one of the t-shirt items of the demo page, a tooltip box appears with the text "page.header.title". On other pages it uses the "title: page" field to display the title of the image, how is this suppose to work on a "snipcart_category.md" page?