I maybe wrong.. but during my yesterday mission i and fly darn close to a buliding... for inspections.. i notice that my dji go app... when i very darn near a object there is a red colour alert just at the left of my screen...
There are no avoidance sensors on the inspire therefore I believe you were seeing some other error... Many a compass error caused by being close to the building or a loss of sats
I maybe wrong.. but during my yesterday mission i and fly darn close to a buliding... for inspections.. i notice that my dji go app... when i very darn near a object there is a red colour alert just at the left of my screen...