Thank you so much for breaking that down for me. I think I understand a little better now, and I have a theory. The only difference between the 2 sites I made using the same code for a contact form is that the working website has the contact form as a separate page. That probably means that NextJS generates the html for that page separately from the main index.html file. I’ll investigate this a little more and report back.
I’ll also do a bit of extra reading to try and understand what my best fix for this would be. Not sure if I want a separate contact form, or if I should use a different approach.
Thanks again for the detailed explanation <3