I've covered a raspberry pi gpio header with a silk rectangle. The result is something like this, being the yellow layer the silk:  But, when I edit some parts or change the layer edit selector the all the vias disappear under the silk:  In the photo view the results look like this, which I don't like because it looks like the copper of the via is completely covered with silk:  Is there something I'm doing wrong? I'm just filling a rectangle over the vias and then let the program to handle it automatically.