Recently I have noticed that my spark changes altitude on its own. Example As I yaw to the side if I start at 10 feet as it moves it lowers on its own several feet to 4 ft. This completely ruins thew shot. I have noticed this on forward and back movements also. Can anyone shed light on how to adjust. There is no explanation that I can think of as to why it is doing this.

Is the sensor and camera under the spark clean ?

Hi, thank you for bringing this query for us and we're sorry for the trouble. Can you please send us a sample video showing the problem for us to further isolate this issue? Also, you may try to calibrate your IMU to see if the problem persists. In addition, please make sure that you are using an updated firmware for us to avoid any possible issues or bugs. Please keep us posted. Thank you for your support!

Careful you're JUST yawing with the stick and not descending too. I have a little trouble with that.

to make sure, it is not you on the sticks:

https://www.phantomhelp.com/logviewer/upload/

Upload your flight record and check the stick movement.
or post the link of the upload here, that gets you "a bit feedback", too!

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