Here another bug from the countless I have to face:

In an assembly, a fully defined sketch, completely black (completely!) that it's moving :

- As you can see there is a converted entity: a line obtained from the projection of the external circumference of the pulley you see in the picture; around that I built everything

- Now i try to move the line ... and ... IT MOVES!! no matter if I rebuild the drawing

- I try to move another line of my fully defined sketch ad look what happens:

Now my sketch it's not fully defined anymore!!