This is a question for the I-751/N-400 combo filers from Chicago, it seems like in Chicago there isn't a combo interview for your I-751 and N-400. From the looks of it or at least from reading 2-3 online experiences, it seems like you first have a N-400 interview, then an I-751 joint interview followed by another N-400 where you are finally approved . This seems to be causing significant delays as opposed to waiting out for the I-751 approval and then applying for the N-400.Perhaps I am getting the timelines wrong, but can anyone from Chicago who applied for their N-400 while their I-751 was pending share their experiences ?
