Had exact situation, sent again, every legal docs, all I94s, I20s, OPT eads, TPS I797s and EADs, H1B i797 and a letter showing timeline of all those showing no gap and claiming continued legal status. Make sure your medical exam form is within deadline of initial filing, there is certain month validity, I learned it hard way during my interview, only reason, I did not got approve during the interview itself but got approved after doing the exam again and sending the recent form. Also got asked a gap in legal stay but explained about automatic extention of EAD when extention is filed while awaiting decision.

Regarding sending docs again, seems redundant but just make sure you do not miss any and have attorney draft summary letter explaining the timeline. Hope this helps.