Renewal Timeline

7/6 Renewal Sent to USCIS
7/8 Renewal Received by USCIS
8/? Biometric Appointment
9/23 Got RFE
9/27 Received RFE letter
9/29 RFE letter Sent out
10/2 RFE Received by USCIS
10/18 Approved for DACA and EAD
10/24 DACA letter Arrived
10/25 EAD will Arrive

What was the RFE about ?