The gamut rings of sRGB.txt have small bumps at some hue angles with the intersectionPlot true, whereas there are no bumps for the gamut rings without the intersection.
Confirmed this as a bug - thanks for spotting and reporting it! I will have a look and see what I can find, it is most likely a bug with the intersection rather than with the intersection ring plotting.
The gamut rings of sRGB.txt have small bumps at some hue angles with the intersectionPlot true, whereas there are no bumps for the gamut rings without the intersection.
The following is a sample m-script:
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