@riyazhyder,
Again, if you deactivate MMR, it’s no longer affecting your site. If you still see MMR assets in your source code (which there are not as of right now) then you need to bust any caches you may have from other caching plugins.
As for your flash of “random shapes and images”… These are your normal page assets being loaded and styled poorly due to the way you’re loading your stylesheets. You have a ton of inline CSS loading in the <head>
of your page – way more than is probably advised for performance. Then you load all the rest of your CSS files at the end of your document with a JS asset loader. This means your page is loading with some styling and showing you incomplete styling for some of these “random shapes” and then it can’t finish loading styles until the rest of the page loads. That’s why there is a slight delay between the “random shapes” and finished styling.
By the way, the “random shapes”, as I said, are just your normal assets with incomplete styling. The big down arrow is just styled to fill its container but the container isn’t styled in your inline styling. It’s the down arrow you have displayed at the top of the page on mobile screen sizes.
I’d recommend undoing whatever changes you made after you activated MMR, as this plugin won’t have any lasting effects once it’s gone and your cache is cleared.