redirectUrl uuid not replaced within mobile web browser

Ii've created a payment request and when I perform the payment from my phone web browser, the uuid of the payment is not passed into the redirect url but it remains as 3D%7Buuid%7D.

Everything is working fine when I invoke the payment request from my pc web browser. After confirming the payment with the app, the redirectUrl is invoked and the uuid is correctly passed in it.

How can I have the same behaviour in my mobile web browser?

Thanks,

Giulio