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Hello,

I import the shared JSON file to my local host, assign it to a post type, create a new post and add some value to the custom fields but do not see any issue.

You can try to delete some choice fields in the field group on your site like checkbox, radio, taxonomy ... and check this issue again.

Hello Bret,

I suggest you can try to add all arguments to the helper function rwmb_meta(), for example:

rwmb_meta( 'privacy', '', 123 );

where 123 is the attachment ID. Because the helper function is not executed in a loop so you need to add the post ID to the third argument.

Or you can try to use the function get_post_meta() if the code is executed earlier than the init hook with priority 20.

Please read more on the documentation
https://docs.metabox.io/functions/rwmb-meta/
https://developer.wordpress.org/reference/functions/get_post_meta/

Hello,

I do not see any issue with that relationship settings. Please share your site credentials via this contact form https://metabox.io/contact/ and let me know where I can see the issue. I will take a closer look.

Hello,

I got the issue. There is a group that has the same ID as the field post content, standard of WordPress, that causes the issue: content
I change the group ID to content_1 then save the post and field values properly.

Hello,

You can try to follow this tutorial to increase the PHP setting max_input_vars to fix the issue
https://metabox.io/wordpress-custom-fields-not-saving-increase-max-input-vars/

Let me know how it goes.

Hello,

Thanks for following up.

Our development team is working on this issue. I will let you know when I have any infomration.

Hello,

I've tested to submit the frontend submission form on your site and see it works correctly. A new post of post type Form was created and saved field value. The field group is assigned to two CPTs so if you want to create a post for a specific CPT, please select it in the block settings. Screenshot https://monosnap.com/file/qER5EydWG5rNaVycFYYmld0TZjfkN4