Hi Filipe,
I've tested on an iPad Air 2 and everything is working ok.
I've seen some issues floating around with the issue you mentioned, I'll leave some references if you or anyone bumps into this and wants to dig further:
- https://www.outsystems.com/forums/discussion/66214/mobile-app-error-failed-to-handle-request-nsmutableurlrequest-0x281eb1580-ios/ (MABS Version)
- https://success.outsystems.com/Support/Enterprise_Customers/Troubleshooting/Error%3A_unexpected_link_in_application_(changes_from_HTTPS_to_HTTP_or_shows_an_internal_server_name) (LoadBalancers)