Make2D Issue Rhino 6_Not all lines are showing

Hi guys I am having an issue when I try to make2D in rhino 6, Not all of the lines seem to be showing after running the command. The image which I have attached is what I have been getting each time, for example only these few lines have been created after selecting all of the lines to the right of the image. If anyone has any ideas on why this is happening it would be great

Hi - please post the 3dm file so that we can take a look at what is going on.