My EB1A was self petitioned. One of the EB1A criteria I had used in my petition was "employed in a critical or essential capacity for an organization that has a distinguished reputation." As a result, several of my recommendation letters were from people in my current and previous organizations. As a result, my current employer was fully aware of my petition. As mentioned previously, an RFE at the I-485 stage for showing that you continue to be engaged in your field of extraordinary ability is not uncommon for EB1A applicants. The simplest way for me to respond was to get a currently dated letter from my employer and subsequently, the GC approval came in a week's time. I am not aware of your circumstances and can only advise you to talk to your immigration lawyer.