Fingerprint sign-in doesn't work except for the first time after app updates. All subsequent sign ons have to enter username and password manually, no fingerprint sign-in. At least until the next update. Fingerprint sensor login does work perfectly fine for plethora of other secured apps. Fingerprint sensor sign-in works for unlocking phone, so I know the sensor itself works. It's been like this for the last several updates. Not sure why it doesn't work anymore.