I'm aware the issue likely has something to do with decimal-date-time, but I haven't found a workaround yet. I have a date question and I want to calculate the length of homelessness in months based off the start date. It works in Survey123 Connect

In the browser it gives me a nonsense number or a 0.

The survey itself is very long and complicated, so I don't want to share the full thing. But this is the relevant section in the XLSForm.