AIR 3S suddenly begins to ascend during flight

[DroneZone Thailand]

During a video flight on the coast, my new Air 3S suddenly ascended independently without me having operated the control stick. When flying low over the water, it first began to climb slowly and then after a few seconds made a real jerk upwards. This happened twice in a row completely from their own doing!

It gives me a bit of a headache because a previous Air 2 fell into the sea due to a malfunction.

Should I say goodbye to my new bird? Or contact DJI support... as a precaution?

Here is the flight log:

The ascent and the two jumps upwards can be followed from timestamp 6m 28s to 6m 50s. In the HD player you can also see that the pilot did not give any Joistick commands to ascend...

What is your opinion?

 

[mavic3usa]

Don't fly over water.

 

[davidarmenb]

Water has a higher reflectivity than the DJI sensors can operate in. The likeliest scenario is that drone thought it was way too close to the ground because of the mismeasurement of the bottom sensors.

 

[DroneZone Thailand]

Sorry, i live on a island... 70% of my flights are over water

The likeliest scenario is that drone thought it was way too close to the ground because of the mismeasurement of the bottom sensors.

Yes... that was definitely an issue with older models. But does the drone's AI correct it twice in a row? (The second time it was higher and definitely outside the sensor range)

 

[WShade]

Sport Mode will probably solve your issue. However, a new and more costly issue may arise.

 

[Meta4]

Don't fly over water.

That's irrelevant nonsense.

Water has a higher reflectivity than the DJI sensors can operate in. The likeliest scenario is that drone thought it was way too close to the ground because of the mismeasurement of the bottom sensors.

You didn't look at the flight data.
The drone rose from 7 ft to 95 ft.
That doesn't happen simply because he was flying over water.

Sport Mode will probably solve your issue.

Sport Mode wouldn't have any effect.
Presumable you imagine the issue was due to the VPS sensors (it didn't).
Obstacle avoidance sensors aren't active in Sport Mode, but VPS sensors are.

However, a new and more costly issue may arise.

What new and more costly issue???

 

[Meta4]

Yes... that was definitely an issue with older models. But does the drone's AI correct it twice in a row? (The second time it was higher and definitely outside the sensor range)

Flying close to water has never caused drones to climb.

Your flight data doesn't show any obvious issue and confirms the drone rising from 7ft to 95 ft without any corresponding throttle input.

Obstacle Avoidance is the most likely explanation for what you observed.
You were flying in a westerly direction, late in the afternoon.
OA sometimes takes action to avoid a low, bright sun.

If you encounter this again, check whether you are flying towards a low, bright sun.
If you are, you can confirm that OA is the cause by changing direction.

Or if you are flying where there are no obstacles (like over water), just disable OA in your app settings.