Guys I need your help, please answer:

Yesterday I took photos for a service using the iPhone 7 and OSMO MOBILE, after about 20 shots I took a break and I checked what was done through the DJI GO application (so I looked at the photos from not downloading them on the phone)
After about two minutes I started to shoot, doing other 10 photos; at the end of the service I opened DJI GO and the first 20 photos were literally disappeared, keeping only the last 10.
What happened? Is there a way to recover them all? I am going crazy
Help me

Thanks from now

Yeah I had the same prom len and still have this problem. The only I was able to get them back is by searching for them in itunes while connected to pc.