I have the same issue and have checked the style section, it has nothing on it. I’m using image background and while it is loading for the image, it will display Green Background.
Would you mind letting us know which section is in question? I tried checking your site but I can’t find the green background that loads before the background image finishes loading.
This threaded was started by different user. Although the problem you are facing is similar but most of the time, posting in a thread started by someone else create lot of confusion resulting in slow response time and frustration for users.
It’s my humble request, please create a new ticket and share the relevant details in that along with the URL. Someone from support team will take a look at help you out. For more details please take a look at following article.