3-D Secure iOS SDK returns different value from Android SDK

When using test card 5555-5555-5555-4444 to test the 3-D Secure expected error condition, we get a different result from the 3-D Secure mobile app Android SDK than we do from the iOS SDK. That card is supposed to cause a Step Up Authentication is Unavailable condition. When we use the Android SDK we get a NoAction value from the onValidated call in the validateResponse.getActionCode. For the same scenario in iOS the stepUpDidValidate has a null value for validateResponse, and no actionCode value is available. We expect the iOS stepUpDidValidate call to include a valid validateResponse with an actionCode of NoAction.

iOS Version: 2.2.5-6
Android Version: 2.2.7-3