Last night I wanted to take night pics. I've taken off at night from my backyard only a few times. I mostly take off from there during the day. So I took off with green "safe to fly" status as I have done for many times with no issues. But last night, as the ac got around to 300', signal was lost for about 5 seconds then came back weak. It was right above me. Didn't move it anywhere, just took it up 300'. I made sure RC antennas where at correct position. Both ac and batt power were full. FW is latest. I was surprised as this never happened before. After taking a few stills, I brought it back down before anything bad happens. Just got worried there for a few seconds. Could this have been due to all the 5 & 2.4 GHz wifi users around me? It was around 9 PM so I figured all my neighbors were already home using their wifi. On a different subject - while the ac is airborne and I launched with DJI GO then closed the app and launched Litchi, will the ac stay in the air? I would think that the ac will loose signal for a brief moment until the other app connects to it. So it should stay airborne and can be controlled after the switch. Would this be correct?