i have same case…i submitted my RFE and status changed to RFE Response review. But mine is not in premium processing mode. So i believe in premium processing mode, once you submit RFE response it changes to Initial review. So you are good. All the best.
H Chnimay…
RFE got approved but i have another prb now…which i will come to later…
USCIS recevied my response on Sept 5th and i got approval yesterday Spet 18th …