Just an idea: the priority of add_action might be the issue. Right now, no priority is used, so the action runs very early and may get overwritten by other actions. Try 999, so the saving of the data happens last.
add_action('save_post', 'acf_add_meta_data',999);
add_action('new_to_publish', 'acf_add_meta_data',999);
Related Posts:
- ACF – Hiding metaboxes through screen settings doesn’t work
- Set Default Admin Screen options & Metabox Order
- How to set default screen options?
- Add “upload media” button in meta box field
- Does WordPress have a “Form API”?
- Metabox with checkbox is not updating
- Best practices for meta box placement?
- Hiding a theme’s meta box
- Block metabox – No expanding, no moving around
- add_meta_box does not go ‘side’
- Getting jQuery sortable items in custom metabox
- How do I stop HTML entities in a custom meta box from being un-htmlentitied?
- meta content on required pages
- get_post_meta doesn’t work
- Remove border on custom meta box
- Create a page Meta Box listing all blog users
- remove_meta_box for all post types doesn’t seem to work
- Position right sidebar metabox right below the publish metabox?
- MetaBox Layout for all users
- How to store multiple input values with same meta_key
- post-excerpt not one of the options under screen options
- How to remove/hide the predictive autocomplete popup when I type in the tag/term metabox
- make a excerpt on data from a meta box?
- metabox upload file
- How to put Periods and Spaces for Array Values (Meta Key)
- How to add a SAVE button to replace PUBLISH on a custom post type?
- Why does get_post_meta not work with the posts page?
- Add_meta_box not appearing, but does appear in screen options
- update_post_meta and get_post_meta not working
- Convert textarea with wp_editor
- Repeatable custom meta fields
- Get all meta boxes values
- Metabox saves on Update or Publish, but not on Saving Draft
- metabox with custom post type values
- Checkbox on a meta box using CMB2 Plugin
- Decide Metabox Configurations for All Users
- metabox select – frontend display
- Set default post author to none on new post
- How to detect if metabox content was updated by the user
- how to save and get selected item id list with add_meta_box
- Remove anchor tag from meta box link
- Adding metabox to wordpress plugins menu page
- How to add select list to meta box field?
- Get meta fields by meta box id
- cannot grab post meta from extended Walker_Category class properly
- How do you List all Sidebars in a Metabox
- Create more Meta Boxes as needed
- Condition display metabox in case the post is saved
- Save meta value as an array of arrays
- Add a meta box to ALL Pages
- How to remove some metaboxes for CPTs?
- How to add metabox ONLY to specific WooCommerce product type [closed]
- Add metabox without the container
- input radio ‘checked’ saves, but select option ‘selected’ doesn’t
- wpalchemi metabox doesn’t show value from my post type
- HTML Table creator in metabox to put into post theme
- edit_page or edit-pages for current_user_can()?
- Editor meta box Showing but not saving
- Insert media button will always add into the same tinyMCE editor
- Change the title of an Administration Panel
- echo the value of a a meta select box
- save radio button selection in post-meta on submit
- How to display multiple $meta_boxes into separate tables
- ShortCut on meta boxes
- How to add a textarea to only one of the fields of this custom metabox?
- Post edit screen: How to check if meta_box is registered?
- Custom Meta Data is not being saved
- how to update post content field in wordpress
- How to ‘clone’ select metabox options with a callback function? [closed]
- Post and Pages section inside WordPress admin are completely blank
- How to create a custom metabox like the wordpress provided tag metabox?
- Update Post meta with custom variable
- display all registered meta boxes
- Serving a custom featured image for mobile
- where can i see the registered new field for posts using register_meta() ?
- update_post_meta doesn’t work
- How to hide/show meta box using jQuery,if click on Drop-Down Menu
- wp_editor metabox does not output the saved html format
- Get value from meta box
- Adding Meta Box to Specific Submenu Page
- jQuery UI Sortable not Working With Metabox
- meta_box: update_post_meta for
- Ridiculous problem with CDATA [duplicate]
- Issue with file paths after porting metabox from main theme to child theme
- Can’t save drop down select date in meta boxes
- WordPress check if value equals and echo “checked”
- Selecting a dynamic sidebar via metabox in wordpress
- Custom-Metaboxes-and-Fields text_url field prepending http://
- Custom metabox for file upload return empty filename
- How to show metabox key to custom post?
- Video slideshow
- Issues with Saving Dynamic Metabox
- Meta Box Value not saving / populating?
- Related posts and custom meta_box?
- Reload meta box content with AJAX
- Meta Boxes causing Header errors
- why esc_url not working in smartmetabox
- Change Default Custom Fields Metabox Name on cctm plugin
- Calling Data from Custom Meta Box
- Saving custom input from settings sidebar of pages in WordPress