Okay, so I just got off call with an agent now from IRCC. According to him, the webform response was probably a false alarm because he mentioned that the documents might have been received by IRCC but someone has to manually download the file and then attach it with the application.
He said that there is very little chance that documents weren't delivered - As long as the email shows "Sent" in my inbox, he assured me that IRCC would have received the email.
I also asked about the "Scanned Files" location in my GCMS notes and he didn't know the exact answer. However, he mentioned that it appears that my file has been digitized (isn't this done at the time of AOR?). He also said that the next update would be the oath ceremony letter if physical presence validation has no issues.