Why are some notes colored (but aren't)?

I was working on an imported XML score using 2.1 (built from source), and noticed that in the vocal line some notes had a strange yellow-green color. I've also tried 2.0.3 and 3.0 (nightly). All windows.

The catch is I can't figure out why. the inspector shows them black. Some on that staff are black (the G that shows black is black; the blue A is the one selected for inspector that shows the yellow-green).

I can't change the color with inspector -- even if I change it, it stays this color (and it still shows black).

I tried using the "Color voices" and it did not affect them. Running it a second time to revert to black did not cause them to revert to black.

It makes me think it is visual aide setting but I cannot find any that relate.

3.0 nightly shows the same.

I've pruned the (copyrighted) music down to a tiny snippet that I think I can post that illustrates the problem, at least for me.

Does it open in color for others?