App-to-app auth flow ends with an apparently frozen login screen in the Santander app on iOS 13.3.
Enduser is unable to complete consent flow and is stuck on Santander
Client is then unable to gain access to end-user data
Phone: iPhone 6s
Last attempt: 01/01/20 8.50 pm GMT
Phone: iPhone 11 Pro Max
Last attempt: 31st December, 6.19AM