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Trouble with overflow and my load animation

So I have a load animation for my “services page” that after the page loads displays a black screen which moves to the right to display the content on the page. Here’s where I run into a problem, with overflow visible the page functions as I want it too, but you are able to scroll to the right which displays the overlay I use for the load animation and a blank white page underneath. With overflow hidden the overlay is no longer visible to the right but my sticky scroll quits working, is there a way to get around this? TIA

Here is my site Read-Only:

Nelson got me fixed during his live stream, thanks again!