Since v6.3.0, Advanced Custom Fields (ACF) disables shortcodes by default. Use this snippet to enable them.
add_action( 'acf/init', 'set_acf_settings' );
function set_acf_settings() {
acf_update_setting( 'enable_shortcode', true );
}This will enable using ACF fields to display dynamic data in WYSIWYG, like
[acf field="field_name" post_id="123"]