My understanding is they process on fifo, but i understand your situation, from AIP in Aug 2020 to no update. Going ahead and complete studies while no final decision was made makes your situation, and similar others unique... because i guess you need to have SP to apply PGWPI don't know what will happen if they refuse my file due to this reason that my study is completed. But, if they will refuse due to this reason that means they are not adhering to their own policies. It is their mistake, they should prioritize the files accordingly but alas they are doing their business from new files.