Explore Sync Hit or Miss

Sometimes my activities do not sync with the Explore App. They go to Connect, but when I open Explore it seems hit or miss if they show up there.

I just checked and I did not have it enabled to run in the background (Android), I turned it on but honestly I'd rather have it off since I'm sure it uses battery and Connect is already enabled.

Is this why I don't see activities going to Explore consistently? If so, how come my activity is gone later, does syncing with Connect erase the activity immediately?