Return Custom Button Value

[dotnetrix]

I have an issue, not sure if this is a WHMCS bug:

 

I have a custom Registrar module developed by ourselves. One of the Registrar functions is:

 

function rar_ApproveTransfer($params) with Error value like this in the actual registrar module:
$values["error"] = 'Cannot approve transfer now';
return $values;

 

The approve button is available to admins:

 

function rar_AdminCustomButtonArray() {
 $buttonarray = array(
     "Approve Transfer" => "ApproveTransfer",
     );
     return $buttonarray;
}

 

as well as to our clients in the client area:

 

function rar_ClientAreaCustomButtonArray() {
 $buttonarray = array(
     "Approve Transfer" => "ApproveTransfer",
     );
     return $buttonarray;
}

 

The problem I am facing is that if an admin clicks on the button it will correctly return:

 

"Cannot approve transfer now".

 

but if a client clicks on the button via domains -> domain details -> management drop down it just does not return any success or error, despite there being:

 

{elseif $registrarcustombuttonresult=="success"}
<div class="alert alert-success">
<button type="button" class="close" data-dismiss="alert" aria-hidden="true">&times</button>
   <p>{$LANG.moduleactionsuccess}</p>
</div>
{elseif $registrarcustombuttonresult}
<div class="alert alert-danger">
   <p><strong>{$LANG.moduleactionfailed}:</strong> {$registrarcustombuttonresult}</p>
</div>

 

Any input appreciated.