SVG render context does not honor stroke style

[jaredjj3]

I'm using RenderContext as a convenient way to render shapes on top of a vexflow music sheet. I'm drawing rectangles like this:

ctx.save();
ctx.setStrokeStyle(strokeStyle);
ctx.rect(x, y, w, h);
ctx.stroke();
ctx.restore();

When I draw with SVGContext, the stroke style is always black. When I draw with CanvasContext, the stroke style is correct. FWIW, SVGContext.arc seems to work correctly (which is evident by the red circles).

SVG

Canvas