Read More text showing as overlay on content.

I checked your content and you are not using a text – you are using an HTML iframe instead (YouTube video). Im not able to help you at this customization request, as it falls completely outside of the basic functionality of the plugin and its not related to my code, but what needs to be done there is to set the position of your iframe and its height, as fixed.

Here is another example page without any video in it with the same issue: https://wordpress-950586-3442415.cloudwaysapps.com/shop/womenswear/dress/japanese-garden-dress/

As mentioned in my previous reply, the issue is related to your stylesheet (probably due to your theme or third party plugins) and not related to my code – as if it was a code issue, it would also happen at my plugin’s demo website, were things do work just fine: https://apps.8web.gr/demos/wordpress-read-more-without-refresh-plugin/