Problem using remoting for Client delete

Hi,

I am using ISPConfig (Version: 2.2.18) as a base system and user account management for my project http://www.zicmama.com
It is running pretty well but some weird behaviors happens when deleting a Client:

PHP:

$soap_client = $my_soap['soap_client'];
$session_id = $my_soap['session_id'];
// Deleting Client
$params = array ( 'sid'            => $session_id,
                        'module'        => 'kunde',
                        'function'    => 'kunde_delete',
                        'params'        => array ( 'kunde_title' => $user_id));

$soap_client->call('service',$params);
if($err = $soap_client->getError()) die("Error remove client: ".$err);

When everything runs well, I have in logs:

But very often (one every two times), I have web sites or users form other Client account put in the Trash??
In this case ISPconfig logs:

I have to restore them before emptying Trash...

Does anybody tried to use remoting this way and has problem with it?
Thanks

 

In this example, I remove Client "martinez"
And I have soumsoum, zeliane, rider260, dayayanis affected by deletion.
Fortunately, I can restore them before emptying Trash.

Here is the Trash after remotin deletion:

Here is the ispconfig log:

Thanks for your help