php - Sandbox PayPal approval link leads to dashboard instead of payment after logging in

I am using PayPal REST API in sandbox mode to test payments.

I create the approval link, then redirect user to said link.

PayPal then asks for credentials which I insert as a sandbox test buyer. But after logging in, PayPal does not redirect me to complete the approval of payment, and instead straight to My Account summary from where I cannot approve the payment. However if the user was already logged in, the payment approval proceeds as expected.

Is it the problem with how was the link created or is it a bug?

This is the code used to create the link

<?php
use PayPal\Api\Amount;
use PayPal\Api\Details;
use PayPal\Api\Item;
use PayPal\Api\ItemList;
use PayPal\Api\Payer;
use PayPal\Api\Payment;
use PayPal\Api\RedirectUrls;
use PayPal\Api\Transaction;
use PayPal\Auth\OAuthTokenCredential;
use PayPal\Rest\ApiContext;

class PaypalFactory
{
private const CLIENT_ID = 'yyy';
private const CLIENT_SECRET = 'xxx';

private function __construct()
{
}

public static final function getContext()
{
    return new ApiContext(
        new OAuthTokenCredential(
            self::CLIENT_ID,
            self::CLIENT_SECRET
        )
    );
}

public static final function createPaymentLink(
    int $orderId,
    string $currency,
    float $totalPrice,
    float $deliveryPrice,
    string $returnUrl,
    string $cancelUrl): string
{
    $payer = new Payer();
    $payer
        ->setPaymentMethod("paypal");

    $details = new Details();
    $details
        ->setShipping($deliveryPrice)
        ->setSubtotal($totalPrice);


    $item = new Item();
    $item
        ->setName('products and shipping')
        ->setCurrency($currency)
        ->setPrice($totalPrice)
        ->setQuantity(1);

    $itemList = new ItemList();
    $itemList->setItems(array($item));


    $amount = new Amount();
    $amount
        ->setCurrency($currency)
        ->setTotal($totalPrice + $deliveryPrice)
        ->setDetails($details);

    $transaction = new Transaction();
    $transaction
        ->setItemList($itemList)
        ->setAmount($amount)
        ->setDescription("Products from ")
        ->setInvoiceNumber($orderId);

    $redirectUrls = new RedirectUrls();
    $redirectUrls
        ->setReturnUrl($returnUrl)
        ->setCancelUrl($cancelUrl);

    $payment = new Payment();
    $payment
        ->setIntent("sale")
        ->setPayer($payer)
        ->setRedirectUrls($redirectUrls)
        ->setTransactions(array($transaction));

    try {
        $payment->create(PaypalFactory::getContext());
    } catch (Exception $ex) {
        print $ex;
    }

    return $payment->getApprovalLink();
}

}
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