Interesting. I never knew about the group thing. I thought groups are assigned as they come to the finishing stage. Did not know they wait till an entire group is done. Perhaps that's why the delay. But this is even more frustrating too. LolYeah for sure.
I also submitted Dec 2021. Except my BG is completed Aug 2022. According to my ATIP notes, they completed a second BG for me, probably cuz they don't think they can complete my application on time and BG expires after a year.
We might be in the same group? I read somewhere on this forum that usually they wait for an entire group of applicants to be all green, then schedule oath for the entire group.