I think some officers that were assigned to some files are on vacation specially since its summer time. So lets say they will be on vacation for 3 weeks. Make sense that some of us that are left hear something from IRCC in August.Cuz they won't be able to find yours as they have still not processed your file through initial checks and still not loaded into their system. Once they will assign a temporary application number to your file then only you will get the AOR