Comment 3 for bug 1643904

To illustrate what Tav explained I moved the mesh nodes so they don't sit on top of each other, so you can better understand what is happening. I also created the circle cut out and an arc and applied the mesh to them, so you can better see how conical gradient works. When conical mesh area (not the same as path area! applied to your example!) covers full circle some mesh nodes aren't visible because there are mesh node pairs positioned at the same location.

We need the "open" conical mesh examples in Mesh gradient docs to make it clear from the start.