I have a quad that I’ve been flying for a year without a single problem until I recently updated to the latest FW. No any HW or settings changes were made. Only FW changed. And that made the quad not flyable any more, because every flight now it starts toilet bowling at approximately 10 minutes of the flight.
I flashed the old FW back and now it holds position precisely again.
I’ve calibrated the mag every time before the flight.
What can be the problem? Why new FW can’t work properly any more with my setup?
Logs of good and bad flight attached.
Good FW was also 4.1 latest but nine month old built.
This quad does have a big metal Li Ion battery, but mag is placed on the mast about 20-25cm away from it.