One witnesses with two documents - Witnesses is duplicatin

Hi,

I´m creatin a envelope with 2 documents using the PHP SDK. Each document requires the signature of a signatory and a witness (the same signatory and the same witness for both documents).
When I send it, the signatory receives it correctly, but a window appears asking him to fill in the witness twice (as if there were two witnesses), and therefore he cannot send it to just one person to be a witness.

I am using the code below. If anyone can help me, I would be grateful.

//Signer
$sign_here_tab = new SignHere([
                'anchor_string' => "**sign_".$signer->id."**",
                'anchor_units' => "pixels",
                'anchor_x_offset' => "0",
                'anchor_y_offset' => "0"
            ]);
            $sign_here_tabs = [$sign_here_tab];
            $tabs = new Tabs([
                'sign_here_tabs' => $sign_here_tabs
            ]);

            $sig = new Signer([
                'email' => $signer->email,
                'name' =>  $signer->name,
                'recipient_id' => $r_id,
                'tabs' => $tabs,
                'email_notification' => new RecipientEmailNotification([
                    'email_subject' => 'Assinatura de novo contrato Arklok',
                    'email_body' => 'Olá '.$signer->name.' você está recebendo um documento para ser assinado como contratante'
                ])
            ]);
            $signers[] = $sig;

//Witness

$sign_here_tab = new SignHere([
                'anchor_string' => "**sign_".$witness->id."**",
                'anchor_units' => "pixels",
                'anchor_x_offset' => "0",
                'anchor_y_offset' => "0"
            ]);
            $sign_here_tabs = [$sign_here_tab];
            $tabs = new Tabs([
                'sign_here_tabs' => $sign_here_tabs
            ]);

            $wit = new Witness([
                'email' => $witness->email,
                'name' =>  $witness->name,
                'witness_for' =>  $s_id,
                'recipient_id' => $r_id,
                'tabs' => $tabs,
                'email_notification' => new RecipientEmailNotification([
                    'email_subject' => 'Assinatura de novo contrato Arklok',
                    'email_body' => 'Olá '.$witness->name.' você está recebendo um documento para ser assinado como testemunha'
                ])
            ]);
            $witnesses[] = $wit;

// Recipients

$recipients = new Recipients(['signers' => $signers,'witnesses'=>$witnesses]);

//Document 1
        $composite_template_contract = new CompositeTemplate([
            'composite_template_id' => "1",
            'document' => $doc_contract,
            'inline_templates' => [new InlineTemplate([
                'recipients' => $recipients,
                'sequence' => "1"
            ])]
        ]);
// Document 2
        $composite_template_term = new CompositeTemplate([
            'composite_template_id' => "2",
            'document' => $doc_term,
            'inline_templates' => [new InlineTemplate([
                'recipients' => $recipients,
                'sequence' => "2"
            ])]
        ]);

        $composite_templates = [$composite_template_contract,$composite_template_term];
        $envelope_definition = new EnvelopeDefinition([
            'composite_templates' => $composite_templates,
            'email_subject' => "Assinatura de documento Arklok",
            'email_blurb' => 'Documento para assinar',
            'status' => "sent"
        ]);