Hey, I'm new to Mavic and don't know if this is normal or I have a problem, when I fly close to the ground at speed, full forward stick, my mini will either randomly climb, or drop. It's hit the ground once, as I didn't notice it dropping until the last minute, I stopped it from flying forward, but it still hit the snow, and other times it just starts climbing. It's very frustrating to try and get a high speed fly over a frozen lake, when it won't hold altitude at all. Up high it seems to be okay. Climb to 40 m and fly forward it holds, but if I'm around 1 to 2 m it will climb and or drop 10 to 20m if I don't try to control the height.

Anyone else have this problem?

Hello and good day. I am sorry for the trouble and thank you for reaching out. It is not recommended to fly the aircraft close to the ground and reflective surfaces. When flying above the reflective surfaces, the vision system of the said drone  will turn off automatically, if the vision system is affected an accident might happen. In addition interference from other sources might have triggered the drone to move uncontrollably.  The Vision System of the DJI Mavic Mini allows the aircraft to hover at low altitudes ( 0.5 to 10 m ), but the ground must have distinct textures, and there needs to be sufficient lighting. Thank you.

DJI Stephen Posted at 12-29 10:01
Hello and good day. I am sorry for the trouble and thank you for reaching out. It is not recommended to fly the aircraft close to the ground and reflective surfaces. When flying above the reflective surfaces, the vision system of the said drone  will turn off automatically, if the vision system is affected an accident might happen. In addition interference from other sources might have triggered the drone to move uncontrollably.  The Vision System of the DJI Mavic Mini allows the aircraft to hover at low altitudes ( 0.5 to 10 m ), but the ground must have distinct textures, and there needs to be sufficient lighting. Thank you.

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So does this mean that the GPS altitude hold turns off below 10m? I'm flying over snow over a frozen lake, and over a pasture. Both perfectly flat.  If it would hold altitude, I wouldn't have to input any elevation adjustment at all.

dustinwild Posted at 12-29 10:44
So does this mean that the GPS altitude hold turns off below 10m? I'm flying over snow over a frozen lake, and over a pasture. Both perfectly flat.  If it would hold altitude, I wouldn't have to input any elevation adjustment at all.

It doesnt turn off, but the down vision system will stop you from crashing in the floor.
The manual says that flying over homogeneous colors, like frozen lake, repetitive patterns, or simply fast, the downward vision system may get confused.
Also you mention snow and frozen lake, temperature may be an issue, the only other user I saw who reported this "drops" was in a cold environment, outside the 0-40 degree celsius mavic mini range.

If you fly into the wind it progressively climbs and doesn’t hold its height, it gets worse moving through the modes c - p -s

dustinwild Posted at 12-29 10:44
So does this mean that the GPS altitude hold turns off below 10m? I'm flying over snow over a frozen lake, and over a pasture. Both perfectly flat.  If it would hold altitude, I wouldn't have to input any elevation adjustment at all.

Hiya,

there is no GPS altitude controlling height. Or its the barometric sensor or its the VPS height sensor.

On takeoff barometric height is set to zero, so this height level is used is as reference to the ascend or descend up or below that height.

cheers
JJB