You are probably getting a message telling you to complete an item in the planning or camera configuration. It will send to the H520E when you complete required items. Is that what you mean? Not export completed map data from your computer, right?
I noticed that my brand new H520E landed and then reacted to ground contact with a up input for a brief moment that caused my "stellar landing" to be challenged. This was done in ANGLE mode.
Regarding your issue; I wonder if you had time to switch to another mode GPS or ANGLE before a out of...