After updating Go4, Mavic Air & Controller to the latest firmware/software versions test flights show issues with altitude hold.
Executing a full rate climb and centering the stick results in the Mavic Air settling down 1 to 2 meters.  A full rate decent and centering the stick results in the Mavic Air climbing 1 to 2 meters.  Using smaller stick inputs results in similar climbs and decents but to a lesser degree.  Testing was done at -6°C.
Flying a 2nd MA with the previous firmware at the same temp did not exibit this issue.

You would need to send the flight logs to someone to verify if this is a command response lag or a temperature response lag or a failure in the aircraft to perform a standard function under those conditions.

Kevjones1959 Posted at 2018-3-29 11:01
You would need to send the flight logs to someone to verify if this is a command response lag or a temperature response lag or a failure in the aircraft to perform a standard function under those conditions.

Notice I tested two MAs under the same conditions, one with new and the other with old firmware.

No issues here.

I also ran at -10

Hi there, I'm sorry to hear about the issue that you are experiencing. Please make sure you have updated the firmware success, I still recommend you to try the update again. At the same time, please change an environment where the temperature is above 0°C to try it again. Thanks!

DJI Diana Posted at 2018-3-29 18:14
Hi there, I'm sorry to hear about the issue that you are experiencing. Please make sure you have updated the firmware success, I still recommend you to try the update again. At the same time, please change an environment where the temperature is above 0°C to try it again. Thanks!

Cannot fly in a warmer environment, in fact its getting colder.  May have to wait a few weeks for better weather.

Hummingbird.UAV Posted at 2018-3-29 18:18
Cannot fly in a warmer environment, in fact its getting colder.  May have to wait a few weeks for better weather.

Sorry for the inconvenience. Yes, then please try it when there is a good weather, if there is any further issue, please feel free to let us know, we'll here for help. Thanks!

-6 is outside the recommended operating temperature for the Aircraft. I understand that the "other" Mavic air worked fine in lower temperatures but unless you can show that your craft actually behaves in this manner when operating within the operating temperature guidelines you might have a problem.