Hi 
@cindyestteacher !
After almost 2 years of process, trust me I know how stressful this is. In my opinion, we don't have anything to worry about at this point. Once the process comes to an end and the final decision is made, they do not change it, and it is clearly stated also for the sponsors because sometimes the sponsor wants to withdraw the application after the final decision, but IRCC won't do it.
As far as I know, they will only revoke your PR if you commit a heinous crime, if you're absent from Canada for more than 2 years out of 5, etc. The inadmissibility reasons can be found here: 
Reasons you may be inadmissible to Canada
But since this is not your case, I believe you do not have anything to fear or worry about.
It is probably a gap in their system, not even means they are checking your application. For example, I became PR on the 15th of May 2020 and my application still states that they are reviewing additional docs, even after DM and PR received. I believe that once PR is granted, our application is closed and there is nothing else to be done. The final decision is FINAL.
I hope I brought you some relief, but in case you need more clarification I advise you to call IRCC and an agent will be able to give you precise info.
All the best,
André