When I export a diagram with lines with arrowheads, when the lines and arrow heads are coloured black (both outline and fill) and I export to svg, the arrow heads are displayed in the browser (I have used chrome, IE and Edge) as unfilled with a faint black outline. If I, for example, change that same line/arrowheads to colour red, when I export to svg, the arrow heads are displayed correctly as filled with red colour.

Appears to be a bug? I wondered if it had been fixed in latest release? I am running V16.3.