Freeform AJAX submission not working when two forms are on same page
Im running into the same issue. In my case they are completely different forms but both with "Enable AJAX" set to true. Could not find anything in the docs either.

This is the error I am seeing. I think I have it narrowed down to the honey pot field not being unique per form. Removing the honey pot setting, fixes the issue.

[DOM] Found 2 elements with non-unique id #freeform_form_handle: