Hotfix: ACF Block Validation not being checked.

acf-validation.php

<?php
/**
 * Hotfix: ACF Block Validation not being checked.
 *
 * @version   1.0.0
 *
 * @author    Seriphyn <https://support.advancedcustomfields.com/forums/users/seriphyn/>
 * @author    Michael Bragg <https://michaelbragg.com> <https://vatu.dev>
 * @copyright 2022 Curiosity Stream Inc.
 */

add_action( 'acf/validate_save_post', 'acf_validate_save_post', 5 );

/**
 * Validate required fields before saving post.
 *
 * @link https://support.advancedcustomfields.com/forums/topic/required-fields-in-gutenberg-editor/
 * @link https://support.advancedcustomfields.com/forums/topic/checking-nonce-when-validating-field/
 *
 * @return void
 */
function acf_validate_save_post(): void {
	// phpcs:ignore WordPress.Security.NonceVerification.Missing -- ACF validates its own nonce before this hook.
	$sanitized_post = wp_unslash( $_POST );

	foreach ( $sanitized_post as $key => $value ) {
		if ( strpos( $key, 'acf' ) !== 0 ) {
			continue;
		}
		if ( empty( $value ) ) {
			continue;
		}
		acf_validate_values( $value, $key );
	}
}