Looks like the Google IdP has restrictions in the way users must login from mobile apps. We have created a ticket and are looking into this internally. We will update this thread when we have a solution.
One note on the fix: in addition to the Ignition Gateway, both iOS and Android Perspective apps must be upgraded to the next version to be able to fully realize the fix. The next versions of the apps are coming soon, keep an eye out for the updates.