works fine for me Litchi with new goapp4 firmware
turn off any power saving on phone
turn off usb debugging if it was on
close all other apps
avoid screen recorders as definitely caused app crashes for me
use a phone with some power 3gb and large internal if possible like 64 gb xioami note 4 ideal at 200 euros
delete go app or put in seperate part of phone which you can with xioami phones
holographic setting should be off in camera in app settings within Litchi
fly away from any interference and cables , buildings, etc
put in airplane mode after caching maps, turns off data and wifi
good signal now!