ENV_EXT_MAG_W started misbehaving at the beginning of December 2023.
We performed some tests, but without results.

In mid-December, its output reached a negative DC value, probably due to a power failure. But in the intermediate box all the power lines are fine.

All that remains is to open the buried box located right on the output of each magnetometer and see if there is any problem with the connection. If not, we will have to pull out the magnetometer and remove it, checking for internal damage (water inside?).