Hi Guys,
I have seen this problem as well using ver 1.5.5
here is a video.
https://vimeo.com/212636439
I think it is related to Compas calibration.
We discovered that we have to wait at least 2 mins at the exact location where it will be calibrated before calibrating it. All this to make sure MAG gets stabilized before calibrating it.
Regards,
pturcotte