View data is disappearing in a certain time

It's the following, so I realized the whole project follows the MVC Standard. I just have a big problem. The view of orders there is a simple refresh of 30 seconds, searching for new orders. So good! The problem happens every day at 9:00 PM, if there is a new customer request, view does not pull the data from the bank to start on the screen. >

To improve understanding, customers use an Android application to place their orders. All requests that appear in the times of (00:00 to 20:59) , the data is shown on the screen, however nothing has been shown.

Who can help me will be very grateful ...

Model:

<?phpnamespaceApp\Model;classPedidosDaoextendsDao{staticpublicfunctiongetPedidosPorPeriodo($data1,$data2){try{$sql="SELECT * FROM cpedido where ped_status != 'PEDIDO RECUSADO' and ped_dataHora between ? and ?";
        $statement_sql = Conexao::getConnection()->prepare($sql);
        $statement_sql->bindValue(1, $data1);
        $statement_sql->bindValue(2, $data2);
        $statement_sql->execute();
        return $statement_sql->fetchAll(\PDO::FETCH_ASSOC);
    } catch (\PDOException $exc) {
        echo $exc->getMessage();
    }
}

static public function getPedidosPorCliente($cli_codigo) {
    try {
        $sql = "SELECT * FROM cpedido where ped_status != 'PEDIDO RECUSADO' and cli_codigo = ?";
        $statement_sql = Conexao::getConnection()->prepare($sql);
        $statement_sql->bindValue(1, $cli_codigo);
        $statement_sql->execute();
        return $statement_sql->fetchAll(\PDO::FETCH_ASSOC);
    } catch (\PDOException $exc) {
        echo $exc->getMessage();
    }
}

static public function getStatusPedido($ped_chave) {
    try {
        $sql = "select ped_status from cpedido where ped_chave = ?";
        $statement_sql = Conexao::getConnection()->prepare($sql);
        $statement_sql->bindValue(1, $ped_chave);
        $statement_sql->execute();
        return $statement_sql->fetch(\PDO::FETCH_ASSOC);
    } catch (\PDOException $exc) {
        echo $exc->getMessage();
    }
}

static public function getCPedido($ped_chave) {
    try {
        $sql = "select * from cpedido where ped_chave = ?";
        $statement_sql = Conexao::getConnection()->prepare($sql);
        $statement_sql->bindValue(1, $ped_chave);
        $statement_sql->execute();
        return $statement_sql->fetch(\PDO::FETCH_ASSOC);
    } catch (\PDOException $exc) {
        echo $exc->getMessage();
    }
}

static public function getAllPedidos($status) {
    try {
        $sql = "select * from cpedido where ped_status = ? AND DATE_FORMAT(ped_dataHora, '%Y-%m-%d') = CURDATE() ";
        $statement_sql = Conexao::getConnection()->prepare($sql);
        $statement_sql->bindValue(1, $status);
        $statement_sql->execute();
        return $statement_sql->fetchAll(\PDO::FETCH_ASSOC);
    } catch (\PDOException $exc) {
        echo $exc->getMessage();
    }
}

static public function getItemPedido($pedchave, $prdcodigo) {
    try {
        $sql = "select * from dpedido where pedchave = ? and prdcodigo = ?";
        $statement_sql = Conexao::getConnection()->prepare($sql);
        $statement_sql->bindValue(1, $pedchave);
        $statement_sql->bindValue(2, $prdcodigo);
        $statement_sql->execute();
        return $statement_sql->fetch(\PDO::FETCH_ASSOC);
    } catch (\PDOException $exc) {
        echo $exc->getMessage();
    }
}

static public function getProdutoPedido($pedchave) {
    try {
        $sql = "select * from dpedido where pedchave = ? and tipo ='PRODUTO' order by prdcodigo asc";
        $statement_sql = Conexao::getConnection()->prepare($sql);
        $statement_sql->bindValue(1, $pedchave);
        $statement_sql->execute();
        return $statement_sql->fetchAll(\PDO::FETCH_ASSOC);
    } catch (\PDOException $exc) {
        echo $exc->getMessage();
    }
}

static public function getAdicionalPedido($pedchave) {
    try {
        $sql = "select * from dpedido where pedchave = ? and tipo ='ADICIONAL'";
        $statement_sql = Conexao::getConnection()->prepare($sql);
        $statement_sql->bindValue(1, $pedchave);
        $statement_sql->execute();
        return $statement_sql->fetchAll(\PDO::FETCH_ASSOC);
    } catch (\PDOException $exc) {
        echo $exc->getMessage();
    }
}

static public function getItemsPedido($pedchave) {
    try {
        $sql = "select * from dpedido where pedchave = ?";
        $statement_sql = Conexao::getConnection()->prepare($sql);
        $statement_sql->bindValue(1, $pedchave);
        $statement_sql->execute();
        return $statement_sql->fetchAll(\PDO::FETCH_ASSOC);
    } catch (\PDOException $exc) {
        echo $exc->getMessage();
    }
}

static public function getProdutosMaisVendidos($data1, $data2) {
    try {
        $sql = "select sum(i.quantidade) as qtd, 
                i.prdcodigo as cod, 
                pr.prd_descricao as descr
                from cpedido p 
                inner join dpedido i on p.ped_chave = i.pedchave
                inner join produtos pr on pr.prd_codigo = i.prdcodigo
                where p.ped_status !=  'PEDIDO RECUSADO' and p.ped_dataHora between ? and ? group by i.prdcodigo order by qtd desc";
        $statement_sql = Conexao::getConnection()->prepare($sql);
        $statement_sql->bindValue(1, $data1);
        $statement_sql->bindValue(2, $data2);
        $statement_sql->execute();
        return $statement_sql->fetchAll(\PDO::FETCH_ASSOC);
    } catch (\PDOException $exc) {
        echo $exc->getMessage();
    }
}

}