Black Rectangle Bug 
Author: Stephen MorozHi there,
I've just finished creating my website and I seem to have a black rectangle in the same place on every page. You can see it on the published site here:
www.stephenmoroz.co.uk
It was present in the previews when I was creating the site, but I presumed it was just a bug that would disappear once published. If it makes any difference, I created the site by using one of the presets and then I deleted everything from it and put in my own content. I have already checked that there are no images in the template structure that might be causing issues, and it's not caused by anything I add to each page, because it still appears on a blank page.
I have also noticed that the black rectangle only appears on the highest breakpoint, when the page is full screen. As soon as you hit any of the smaller breakpoints, the rectangle disappears and everything looks correct.
If you can help in any way, that would be fantastic.
Best,
Stephen Moroz
It's probably in the repeat of the biggest viewport in your menu of your template.
If you have a picture there remove it but first scan the colour with colour picker,
The full picture you have there is probably black in te end when repeating you see it when screen is width enough.
So just set an even colour.
Author
Thanks for the reply Andre! You were definitely correct about it being an image...
Turns out it was an image object in the header content, although it was hidden from most of the viewports. I went to the "Show/Hide" settings and managed to unhide the image and delete it. All sorted now! :)