The reason for this mishap was very likely the table surface...
This from page 18 in the user manual.
Just in the end of the landing the log shows that the VPS height disappears just before the drone tumbles over the edge of the table... this...
I usually have these 4 categories checked on that map... these areas together with the restrictions from the "Drönarkartan" makes it hard to fly in the most interesting areas on Gotland... usually I don't bother to bring a drone there.
And in...
Download DankDroneDownloader here --> Release Version 3.0 Build 9249.18015 · cs2000/DankDroneDownloader
Run the .exe file (no install) and dial in what you want & download the .bin (newest for the DJI RC2 is v06.00.0100)
You don't need to have the CPL on the drone when figuring out the setting... just look through the filter directly when you pointing it in the same direction as you later will take the shoot, there adjust it until you have the strength you desire.