if F2A retrogress furthermore, in the future, there may be more RFE asking proof that I-485 was submitted when PD was current. It happened around 2010 to some EB2/EB3 who submitted I-485 in early August 2007. Officers didn't remember EB PD was current until Aug 17, 2007 Can't blame them, what normal people except those applicants and immigration lawyers would remember?