No CAPTCHA reCAPTCHA for WooCommerce plugin - Lost password wrong link fix.

functions.php

<?php

/**
 * This piece of code fixes the "No CAPTCHA reCAPTCHA for WooCommerce" plugin's incorrect code when generating 
 * lost password link. You can copy it to functions.php of your theme or child theme until the plugin developer fixes
 * the plugin behavior.
 */

// Add our fixed version only if the original filter is hooked already.
if ( has_filter( 'allow_password_reset', array( 'WC_Ncr_Lost_Password_Captcha', 'validate_lost_password_captcha' ) ) ) {
	add_filter( 'allow_password_reset', 'my_theme_prefix_validate_lost_password_captcha', 11 );
}

function my_theme_prefix_validate_lost_password_captcha( $allow ) {

	// Only run if password reset form sent and captcha response exists.
	if ( isset( $_POST['wc_reset_password'] ) && isset( $_POST['g-recaptcha-response'] ) ) {

		// Since we are running the filter with priority 11 it will run after the first time of the original validation.
		// We want to then remove the original filter as it will be called 2nd time when generating the reset link and
		// the captcha key will already be invalid as already validated the first time.

		if ( $allow ) {
			// Remove the broken validation hook from the plugin.
			remove_filter( 'allow_password_reset', array( 'WC_Ncr_Lost_Password_Captcha', 'validate_lost_password_captcha' ) );
		}

	}

	return $allow;
}