@shelly-goelThank you for the links. After a bit more searching of the
documentation: to solve this, when using getOffers I had to set the
consumerId key to a unique value (it was defaulting to 'undefined' even
if I was request regional mboxes). That value is used to determine
whether the API should generate a new SDID or if it reuses the SDID
already available on the page.