This bug seams appear since the last librSVG update (2.40.2). (reported on Commons: GL/I). The gradient get from white to black with transparency on the circle element (in the example file there is also a clipping on the circle but this doesn't matter, I tested many cases to get the very strange workaround, the circle element also doesn't matter):
- https://commons.wikimedia.org/wiki/File:Structure_of_the_magnetosphere_arrows.svg (I purged the image so the error appears now on the last version)
Workaround/fix (really strange) is to increase the x/y coords of the radialGradient:
