First app I submitted to the App Store was rejected, for an edge case I'd not tested (slow network) and they were concerned that the app wasn't communicating to

First app I submitted to the App Store was rejected, for an edge case I'd not tested (slow network) and they were concerned that the app wasn't communicating to the user what was occurring, which was fine. I improved it, resubmitted it so it was much more expressive and it was rejected again for the same reason. I immediately resubmitted it with a description of what the app was doing, why it was doing it, and why it was unavoidable in that circumstance and they then approved it. It does seem at times slightly capricious, and it took a lot of reading and rereading the guidelines to work out what I needed to improve, but it led to a better app overall.