White spacing in the header

I hope you can help me! There is a white spacing in my header, right beneath the header. The spacing is there only on desktop. When you visit the website on mobile it is gone.

The image is large enough, thus that’s not it. Also I have set the options in the theme settings to different sizes (theme options: header-V1), but the spacing won’t disapear. Have you any idea what I am doing wrong?

The link to my website: https://sylbloemen.nl/

Ticket