Looking for loader.svg transparency settings.

I'm trying to find where the transparency settings are for the loader.svg file on the product page.

When you go to a specific product page and click on the product image to load the larger image. Or when you click on any additional images the product may have. The loader.svg file is not transparent.

Everywhere else the loader displays correctly.

Thanks!

Did you replace Featherlight with Featherlight gallery?
https://www.litecart.net/en/addons/281/featherlight-gallery

No I did not.

Is it reproducable in the demo?
https://demo.litecart.net/

Yes.

If you go to a product page. Blue Ducks - I.e. https://demo.litecart.net/rubber-ducks-c-1/blue-duck-p-4

When you click on the blue duck it will pop up a larger picture of the blue duck, If you can catch it in time you can see the loader will spin in the time that it takes to load the larger blue duck. It is much easier to see on my site as my web server is slower. :( 

Check my product page: https://www.twistedandthrifted.com/shop/handmade-c-6/i-hate-it-here-p-336 Click on the product and you will see the loader image.

I first noticed it in version 2.5.3 as that was the version of litecart that I started with. I figured I would run across the code at some point, but haven't.

Confirmed. I don't know why this happens. It's part of the Featherlight implementation.
Adding it to the list of things to do. But there are some other things with higher priority first.
Git pull requests are welcome.