TCPDF MultiCell Auto AddPage

Good Day Guys! I need some help when using TCPDF, I have this problem where the first page renders the details ok but on the second page, all the details are stacked at one area, I'm using MultiCell for the details.

public function PageHeader() {
        $this->SetMargins(5, $this->GetY(), -1, true);
        $this->SetCellPadding(0); 
}

private function _addPage() {
        $top_margin = 50;
        $this->AddPage();
        $this->setCellHeightRatio(1.25);
        $this->SetMargins(5, $top_margin, 5, true);
        $this->SetTopMargin($top_margin);
    }