Im having a problem with mavic air. Almost 200meters on open field. Lost signal

There, just to verify, does the issue happen in many environments? I suggest that you can try to test in more places, keep the RC antennas pointed correctly to the drone, RC antennas are positioned parallel to and are pointed towards the aircraft. Check the WiFi settings and select a channel with less noise to fly. Make sure that the drone and RC are all updated to the latest firmware. Also, may I know the mobile device you are using? Please also try to change the connecting cable or the mobile device to troubleshoot the issue.