Zach,
Thank you for the response. It is as you say: there are a lot of relevant questions in this survey, and the data that is not coming through is based on an answer to a relevant question, which is itself a relevant question. What is peculiar is that it was working in an earlier version of the survey123 app (we've been using this survey for a couple of years now).
I can send you the XLSForm and URL scheme in a private channel if it still might be useful to you. Otherwise, do you have a prognosis as to when we can expect a fix for this?
Thank you,
James Faron