Same boat here, application received on Feb 14, no AOR. Did a request using their form on Sep 2, few days later the answer was:
"We have verified the information you provided and can confirm that your application is not available in the system yet.
However, rest assured that this situation is normal since the responsible office is currently processing applications received before January 14, 2020.
We invite you to verify the
processing times on the IRCC website and contact us using the
IRCC Web form if they have passed."
Gotta wait