Thanks!
My pleasure to help, no worries.
What happened for me is that I was in the same place as you (everything dead quiet for months) so I requested the ATIP.
In my ATIP I notice that I had "invitation to pre-arrival services" issued and then cancelled, replaced by the medical request.
(So basically: looks like the agent was ready to finish my application, but the medical request was still missing since for some reason they don't ask it in the beginning of the process, for QC applicants...)
I wanted to send a webform to try to get them to move, and I realized I could use what I learned in the ATIP.
I used some weasel language in my webform request, something like "Dear officer, I realize that my application is still within the estimated time frame. However, I saw in my ATIP that I was issued the invitation to pre-arrival services, and I never received it. Can you please verify what happened?"
All I said was true, but of course, I actually knew why I never received it (it was cancelled since the medical was still missing).
I'm not sure if my webform helped or not, but it might have. Things started moving the week after that, coincidence or not.