I ran into this today by accident. I have a site that has a form (form.html) with the name, “Contact Form”, and the action
/thankyou.html. I made a new form (form1.html) and did NOT specify an action. On submit, it still goes to /thankyou.html. The URL doesn’t show this, it shows /form1.html, but the contents are thankyou.html. That’s bug one.
Now for the weird part. I figured out the issue must be the form name. Netlify saw the earlier submission of form.html with the same name and just assumed, “All forms with this name go to /thankyou.html.” However, in form1.html, I specified a new action, /rc.html. I definitely typed out the full path. On submit, it still renders thankyou.html, but the URL says /rc.
The fix is to obviously have unique names, but I’d argue that if I have a specific action, I should end up there.