Vector Fill creates white edges

Hello,

I want to use vector brushes and vector fill but i always get a white edge if I fill in the same color as my vector line.

In more detail: I create a closed object using the vector brush.  I then create another layer and make the layer with the object a reference layer. I take the paint bucket and fill in the same color on another layer. As you can see in the images there is a white margin on the edge. And there is no option to fix the margin like with pixels. How can i get rid of the margin? Thank you!