I was flying the boundary of my land, a Litchi mission I've flown many times, 3rd time today, good GPS lock. My attention wondered a few seconds till I heard the beeping: Signal Lost. The Spark had flown ~1,000 ft off course at last contact. Before I first used Litchi I changed Smart Return To Home from off to on. It now in off on my phone. Is that because it's disconnected from the AC? If SRTH was off would the bird have hovered in place till the battery died, then fell when, it lost signal?