Issues with drawArc + SDK 4.0.1 ?

I am currently trying out the new SDK and I experience strange artifacts with drawArc.

Here is a code extract

dc.setPenWidth(10);
dc.setColor(Graphics.COLOR_RED, getBackgroundColor());
dc.drawArc(geometry[1], geometry[1], geometry[7], Gfx.ARC_COUNTER_CLOCKWISE,
           30, 60);

dc.setColor(Graphics.COLOR_BLUE, getBackgroundColor());
dc.drawArc(geometry[1], geometry[1], geometry[7], Gfx.ARC_COUNTER_CLOCKWISE,
           120, 150);

dc.setColor(Graphics.COLOR_GREEN, getBackgroundColor());
dc.drawArc(geometry[1], geometry[1], geometry[7], Gfx.ARC_COUNTER_CLOCKWISE,
           60, 120);

Before (3.2.5), no artifact

After (SDK 4.0.1), artifact. 

If I remove the code for the draw arc, no issues. Each new draw arc is "adding" on top of another at the same place so I'm not sure if I should do something specific but it looks like a bug to me

BTW, very cool that the new SDK now supports FIT data simulation of structured workout, much much easier to develop with this.