We spoke to the merchant and they shared the issue isn’t intermittent, it’s happening 100% of the time to specific products. Upon digging into their Shopify account, we determined that they didn’t have their “All Regions” catalog set for these specific products.
vs.
Shopify team, is it possible to get more specific error handling than “Couldn’t load checkout?” Or to return some kind of error in the POS cart itself, if a product isn’t part of a required regional catalog?
As an aside, this is the second time now where something related to catalogs has broken functionality with our POS UI Extension: Can't add API-created product to POS cart affecting specific merchants - #3 by derrick