@Flyingboy did you trying reaching out to DJI support for help?
If they determine the problem is due to a defect, they might replace your drone or help cover the cost of a new one.
Yes I first reached out to the DJI Support, but first they didn't do anything since the drone is out of it's warranty but only by 2 months. They wanted to charge me 50 Bucks to analyze the flight log.
I got them then to look at the flight log...
Wow perfect thanks a lot for the answers!
The height of the VPS makes sense that it reads zero since i used a grab stick mounted to the drone which blocked the downward facing sonars.
Do you know how I could prevent that error from happening when...
I launched my drone as many other times from a slow moving boat making sure it moved forward and I stood at the back of the boat so the drone drifts away from the boat as it holds its GPS position. But this time it lifted normaly out of my hands...