Right before COVID closed everything down, I too as was asked for another Schedule A (IMM 5669e). In their request they made it seem like I hadn't filled out my full employment history, but I most definitely had. The only thing I could come up with is that with my PR packet I submitted the form with the (11-2018) date at the bottom, and there was another form with (06-2019) at the bottom. I filled out the (06-2019) version and uploaded. I haven't heard anything else, so I'm hoping that was the issue and it is now resolved. Could this possibly be your issue, as well?