Quite honestly, it's very annoying a lot of you continue to ask questions of "when to ask your congressman or woman". It's been a year. Several people have said to contact your congress individual. It changes things quickly and efficiently. I contacted my Congressman 2/6 after being the "case received" stage. Was approved 10 days later. I had an issue with my application and recontacted my congress man. they solved it in 2 days and saved me $465.
Contact your congressman. Stop listening to computer generated "processing times".