I did an ATIP to the CSIS and was told by them that they do not hold any information about me.Actually, the criminality assessment is already passed.
It is the security that is being stalled and processed by the CSIS.
I heard in PR applications people may get comprehensive security screening which is quite lengthy in time. I am afraid it is my case as well although I have not heard a case of citizenship application gets CSS...
I have changed my name once while being a PR so I was a bit worried that they might have only searched using my new name but not my old name. But more likely it's just being held in the queue.