What waypoint limitations are there in Litchi? I have a simple mission that has failed to start twice: The mission starts from #1 my home, to #2 my father's home at 840m distance, then #3 back to my home, then RTH. But there was an alert "Distance between two adjacent waypoint is too close" and the mission failed. I guess points #1 and #3 were too close, right? So I adjusted the waypoint #3 100m further -- is that enough?? Anyway, I'd prefer to keep waypoint #3 on right top of the waypoint #1, if possible. The second mission failed, too. I believe it failed because I had DJI GO's Maximum Flight Distance set to 500m, right? I guess also DJI GO's max altitude can't be exceeded? I have it at 120m but it seems Litchi can start missions only at 110m or so, so I guess there is some rounding error there?