I was students all the time In Canada, never worked in anywhere else. my background is super simple, no government position, no military service, no anything can be suspected. I do not think your background can be simpler than me.
now after graduation from a canada university, I got a very good job in canada before applying for PR, I do filing tax every year, all credits score in bank is the highest.
At last, my country of origin is not an issue at all, since others from my country do not even know Security Screening. they got their PR already. 95% of them do not have SS.
btw IRCC will never tell you if you are in Security screening or not, they cannot answer you this question. the only way to confirm is to order note.
I never think I will be SS. Since all my history for WP and SP are very smooth. But I think I am in Security Screening now. I have security check initiated status before. as far as I know, people who are NOT in SS and get PR, they will NOT have this status.
The security check status for them is either Not Started or Completed. They do not have anything like security check initiated or in process....