Small line between blocs

I use a bloc with text inside. Above this bloc I use a bloc edge to edge with a background image and a image in a row. Set the padding with a custom class to top 400 px and bottom 0 px. So the image is close to the next bloc with the text. I use a svg image … But between the two blocs there is a small little line, only see in browser …
Bildschirmfoto 2020-08-06 um 23.12.01

not good to see in the screenshot - sorry
any ideas ?