Does anyone knows what happens when I start my DJI Spark from a covered place without proper GPS signals and fly into a space with correct GPS information and the drone signal got lost? I assume it will try to fly to the RTH point. But where is that: no new RTH point was set at the start of this flight. Will it try to fly home to the RTH point from yesterday which may be miles away, or the point where it picked up GPS signals during this flight?