I cannot save a new post using multiple acf_forms.
I am using acf_form in a customized style which requires me to split the form into a few different <div> elements.
According to the support forum I found that in order to do that you must define 'form' => false in the acf_form() settings and add the form tag and submit input manually.
(Here it states it clearly)
I did that calling 2 different acf_form()’s with different field_groups, but after submitting the form it failed to create a new post.
What is strange is that when I tried it calling only 1 acf_form it worked perfectly.