Generally as far as I know after giving biometrics only they wil know about previous rejections but they sent u PFL before you complete your biometrics?? It is strange
I also received additional document request and i uploaded through my CIC account and I did not get any confirmation message after that. Its been already 1 month
Can i know the reason for your PFL
I also received PFL as I mentioned about my US student visa refusal and forgot to mention about USA tourist visa refusal its been 2 weeks and I did not get any response after I uploaded my response.