The biggest issue over the last two months is the during flight, the GO4 app completely locks up and forces you to get the aircraft back using either the RTH button on the controller, or to fly home using the controller. On some shoots, especially at distances, this has caused me much grief. I fly over water a great deal right now and on several occasions have thought my drone was lost.
DJI support has been unable to identify and resolve the problem. Their are quite a few threads on this issue, so I know I am not alone... No one seems to know if it is a HW problem or a GO4 app problem, but either way, the only way to recover is get the drone back, power everything down, and then restart everything.
The issue has made flying extremely stressful of late!!