Whatsapp link stopped working

Hello There,
I successfully added in the past a whatsapp share button as suggested in this forum with the following function in functin.php

add_filter('avia_social_share_link_arguments', 'avia_add_social_share_link_arguments', 10, 1);
function avia_add_social_share_link_arguments($args) {
$args['whatsapp'] = array("encode"=>true, "encode_urls"=>false, "pattern" => "whatsapp://send?[title]&url=[permalink]", 'label' => __("Condividi su Whatsapp",'avia_framework'));
return $args;}

After the last WP update to 5.2. suddenly the whatsapp links stopped working. The outout is empty.

Is this caused by wordpress or Enfold needs an update too? Do you have any idea how to solve this?
Thanks