This similarly happen to me. I got an email saying my application status is updated on Aug 27, when i check my GCKey, it said application "approved". When I go inside it showed application is in progress, eligibility and Background check is still in progress. My biometric info disappeared. But i never gotten counterfoil generated. I submitted my passport and its still under progress since Aug 13. People from my date are already getting their passport stamped and dispatched already... did you happen to call them? if did, what they say about the changes?