If I change the background color of a board from light grey to dark grey, hollow arrowheads are filled with light grey paint, so that they are not appear hollow anymore. It would be nice if hollow arrowheads are really transparent.

If I change the background color of a board from light grey to dark grey, hollow arrowheads are filled with light grey paint, so that they are not appear hollow anymore. It would be nice if hollow arrowheads are really transparent.
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