There are several posts in the forums relating to this issue but none of the fixes are working. If you navigate using the LHS menu, there is a flash to white until the linked page loads. How do I trouble-shoot this before the client says, "Why does the page flash when I click the button"? It's published at
For me it just looks like a white browser fill or no browser fill. It´s just a matter of loading times, maybe.
For me it takes about 1 second or little less or little more for loading pages – no blinking.
I don`t know, why it takes a little time to load as the content seems not to be too much, did you use a 3rd party widget on your pages?
Your art classes and cooking classes take longer to load with less content.
Adding to Uwe, what you's site shows is the expected workflow and the white screen which you get is just the time taken to lead the new menu page.
However I don't see a flash as described above, or did you manage to resolve it?