Ping Identity has identified an issue in Google Firebase, a third-party service used by the PingID iOS app. Some users might experienced an unexpected app closure when opened the app or attempted authentication. The issue was not caused by a PingID deployment or Ping service disruption. The issue has been resolved by Google at 03:00am UTC. Firebase issue in Github: https://github.com/firebase/firebase-ios-sdk/issues/16728#issuecomment-5884287771