Tremolo not positioning on note stem

[Griffin Ciluffo]

Hi all. Was wondering if anyone has had issues with tremolos not positioning correctly on a note stem? Also seems like setPosition() method on Modifier class which Tremolo extends, doesnt seem to move the position of the tremolo at all. Thanks in advance.

Im doing it like so:

let note = new vexflow.Flow.StaveNote({ keys: ["b/4"], duration: '8d' });
note.addArticulation(0, new vexflow.Flow.Tremolo(1).setPosition(vexflow.Flow.Modifier.Position.CENTER));

Renders:

[Griffin Ciluffo]

setXShift() seems to modify the x value. But it looks like the draw function isnt accounting for shift.

[Griffin Ciluffo]

Is there a way to adjust the tremolo with postFormatting?