The amout of bugs is outstanding indeed. There is no place in rhino where you can feel it is not going to fall apart.
Linetype scales are broken, widths, colors, annotations… all broken
Make a box. In layout callout dimvolume and click on the box to get volume of the box. You get a leader with supposed volume. Click on it and change its annotationstyle to somethings else. Leader dissapears. Make sure the other annotation style has different units (i had mm → m). I dont know if its related to different units i just observed it disappeared.