I have a white line. When I switch from basic to dashed line 1.1, the line turns gray. Paintbucketing the line just makes it a basic line again. Based on all the settings I'm aware of, the line should be white, but it seems to arbitrarily change to a gray color when I choose any other type of line that isn't basic.
The first shows a basic white line, and the second shows what happens when I switch from basic to dashed line 1.1. The second is a closeup of the dashed gray line in case it would have been hard to see otherwise.