The suggested solution was to utilize query strings to create a redirect page. When Stripe sends the user back to the primary domain, the query string can act as a disintermediation page that further redirects the user back to their original prefix domain. This redirection should be almost instantaneous, because the necessary data is transmitted as part of the query string.
There were questions about constructing this query string from Stripe, which is an intricate question. The team agreed to discuss this further in a forum and revisit in office hours. The meeting ended with a reminder about two office hours sessions held the following day.