ACF gutenberg tag field doesn't save

• futurelab

• January 18, 2021 at 9:22 pm

Your support system is down……

Hi there,
I have a problem with ACF Gutenberg blocks not working in specific case.
I want to be able to select specific news + specific tags.
So I created this field:

acf_add_local_field_group(array(
        'key'                   => 'group_5cbe885ee190f',
        'title'                 => 'Block: Related content',
        'fields'                => array(
            array(
                'key'               => 'field_5cbe88701e944',
                'label'             => 'Related case studies',
                'name'              => 'related_case_studies',
                'type'              => 'post_object',
                'instructions'      => 'Select related case studies',
                'required'          => 0,
                'conditional_logic' => 0,
                'wrapper'           => array(
                    'width' => '',
                    'class' => '',
                    'id'    => '',
                ),
                'post_type'         => array(
                    0 => 'post',
                ),
                'taxonomy'          => '',
                'allow_null'        => 0,
                'multiple'          => 1,
                'return_format'     => 'id',
                'ui'                => 1,
            ),
            array(
                'key' => 'field_5cbe43102f4e6',
                'label' => 'Related tag',
                'name' => 'related_tag',
                'type' => 'taxonomy',
                'instructions' => '',
                'required' => 0,
                'conditional_logic' => 0,
                'wrapper' => array(
                    'width' => '',
                    'class' => '',
                    'id' => '',
                ),
                'taxonomy' => 'post_tag',
                'field_type' => 'multi_select',
                'allow_null' => 0,
                'add_term' => 0,
                'save_terms' => 0,
                'load_terms' => 1,
                'return_format' => 'id',
                'multiple' => 0,
            ),
            array(
                'key'               => 'field_5cbfe272c9326',
                'label'             => 'Block title',
                'name'              => 'block_title',
                'type'              => 'text',
                'instructions'      => 'The title to use eg: "More Insights". Defaults to "Related".',
                'required'          => 0,
                'conditional_logic' => 0,
                'wrapper'           => array(
                    'width' => '',
                    'class' => '',
                    'id'    => '',
                ),
                'default_value'     => 'Related',
                'placeholder'       => '',
                'prepend'           => '',
                'append'            => '',
                'maxlength'         => '',
            ),
        ),
        'location'              => array(
            array(
                array(
                    'param'    => 'block',
                    'operator' => '==',
                    'value'    => 'acf/related',
                ),
            ),
        ),
        'menu_order'            => 0,
        'position'              => 'acf_after_title',
        'style'                 => 'seamless',
        'label_placement'       => 'top',
        'instruction_placement' => 'label',
        'hide_on_screen'        => '',
        'active'                => true,
        'description'           => '',
    ));

Now out of this post and title works but tag doesn’t. Why? Because it’s not recognised by ACF. Here’s test post content:

<!-- wp:acf/related {"id":"block_60055cc22371a","name":"acf/related","data":{"related_case_studies":["16043"],"_related_case_studies":"field_5cbe88701e944","related_tag":["240"],"_related_tag":"field_5cbe43102f4e6","block_title":"Related","_block_title":"field_5cbfe272c9326"},"align":"","mode":"preview"} /-->

When admin page loads, case study field preloads with the right article, but tag field doesn’t – it’s empty on the sidebar. And the ID is correct 240 is correct taxonomy ID. Any hints?