Sticky header on front page no longer shows background color when I scroll down

As per above, overnight my sticky header no longer shows a white background when I scroll down the front page, it is now transparent. This is only the case on my front page, all other pages are as they should be . Not sure what’s happened but I’ve not done anything to it. All help would be appreciated!

• This topic was modified 3 years, 11 months ago by inherpotential.