Starting from beta 9.71 there is a drawing bug introduced when using fillPolygon.
These simple 2 lines of code will show the triangles are not drawed correctly on the real watch, but they are correct on emulator. On 9.20 firmware they are correct on the real watch too.
dc.fillPolygon([[43, 50], [55, 50], [48, 44]]); // upIcon
dc.fillPolygon([[186, 44], [196, 44], [190, 49]]); // downIcon