Similar issue. WP 3.9. ACF 4.3.7. My “Create a new task” submit button displays, but no form, and this error message: “Warning: array_merge() [function.array-merge]: Argument #1 is not an array in …wp-content/plugins/advanced-custom-fields/core/api.php on line 1185”
<?php acf_form(array(
'post_id' => 'new_post',
'new_post' => array(
'post_type' => 'todo_task',
'post_status' => 'publish'
),
'submit_value' => 'Create a new task'
)); ?>
Similar issue. WP 3.9, ACF 4.3.7. Not limited to repeater fields. Wherever I create a custom field with a rule where “Page is equal to Home” (or similar), the field shows up when editing that page, but upon saving, the content disappears. (Also confirmed it’s not saving to db.)
I still don’t know what was causing the problem, but fortunately I’m early enough in production that I was able to just delete and replace the problematic relationship ACF and now it’s working.. not sure what that means.
Reporting the exact same problem.