Receipt Page after payment completed

[MarcoHijacker]

Hi omnipay-paypal community,

I updated an old PayPal cart (still using the deprecated form to paypal url method) to Omnipay-paypal.
I was able to get everything setup, apart the receipt page after-payment, which now disappeared.
User is bounced immediately to return_url, after the Pay Now button is clicked and payment is authorized and completed.

How can I revert the receipt page with the usual 'Return to merchant website' which used to redirect user to return_url after being clicked?

Best regards,

Marco.