This is problem I have encountered several times since owning my 13" MBP with Touch Bar. I will go to unlock by using Touch ID, only for it to fail to work the first time, and any subsequent re-trys. Eventually I will click 'Cancel' on the lock screen (in an effort to unlock by entering my password). At this point the screen goes black and the mouse pointer appears -- I'm unable to do anything at this point, so I force shut down. It has happened enough times for me to notice this behavior - I wonder if anyone else has documented this. EDIT: I've just noticed my 'stored fingerprints' for Touch ID are no longer present in Settings. At what stage this occured, I can't be sure.