I am having the exact same problem with my multisite. Everything works well in the back-end, but when I try to use front-end form to create a new post, post object field doesn’t populate any choices. Or if I choose something and save it from back-end, it only shows that selected option on the front-end.
Other fields that use select2 (user field etc.) also doesn’t populate any choices on the front-end form.
I am using acf_form function
I am using wordpress 5.4 and ACF 5.8.9
*I don’t have any JS errors on console
*I don’t have any PHP errors on WP_DEBUG
*I tried to disable all other plugins but that didn’t work either
*I tried every possible placement of wp_footer and acf_form_head to give best priority to loading of acf components
*my custom theme doesn’t contain any other AJAX requests
*I read all forum threads and google search results about similiar errors.
Still couldn’t find an answer.
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