Litchi app shut down mid-mission after signal loss

[Geoff44]

I have just had Litchi end a mission about half way round a 100 acre block then p4p drifted lucky for me I had full contact at the time had I been out of range it would have been lost in bush lands
Litchi help tell me it was probably caused by interference of satellite contact causing a switch to Atti mode
When checking video the mission did end when crossing 50meters above a normal power line ?