In Inkscape v1.1 on Ubuntu, I can apply a mesh gradient to an object's fill. Cool! However, even when I set the color for all the node handles in the mesh, I still get what I can only describe as "hotspots": places where the mesh gradient doesn't seem to be responding to the colors that I've set.
In this example, for instance, the three-pointed purple flare at the center (and stretching out along the yellow segment) baffles me. The color of the center point is set to white. The two handles along the yellow edge are both set to the same yellow, and the two handles along the green edge are set to the same green. I can see no place where that purple is defined in the mesh gradient, at least using the graphical controls given to me. And yet, it's present.
What is causing these problems with the mesh gradient, and how can I fix them so that colors transition smoothly throughout the entire mesh, and there are no "hotspots" of colors not defined by the mesh?