Hi,
Thank you for the details. It looks like this is only a cache related problem. I see you have a custom minification/asset cache solution active. On the main URL (https://usocmedical.com/) the file containing the correct loader CSS descriptors is:
https://cdn.usocmedical.com/wp-content/cache/minify/cd7dc.css
while on the other page it’s:
https://cdn.usocmedical.com/wp-content/cache/minify/6c6c0.css
This second file does not contain the loader descriptors, that’s why they are not visible.
It looks like the second one is an older/different version of the same CSS asset file. If you clear all layers of cache (page, asset, CDN, cloudflare, browser etc..) then the changes should propagate.
Unfortunately the plugin cannot control these assets, as caching is fully independent from the plugin. If you want, there is a conditional, asynchronous CSS loader feature within the plugin, that may also give your site some performance benefits. It may not work in some cases, but I thought you might find it interesting.