How are the buttons being added to the content or template(s)? Are you using the plugin location settings for before/after, or are you adding them using a shortcode, or are they coded in the template?
If they are coded in the template, please note the instructions on the settings page and pick the manual placement option for posts: “Checking manual placement will allow the plugin styles to load as needed, if you are adding the buttons using code.”
If you are adding using a shortcode, the plugin should be able to figure that out, but it looks like you are using Beaver Builder, so that additional layer may affect the plugin’s ability to “see” the shortcode. Selecting the manual option for posts should resolve this–basically, it just tells the plugin to load the assets on singular posts and assume that the buttons will be added, whether they are or not.
Checking the manual placement setting for posts should get you sorted, but if not, I need to know more specifically how the buttons are being added to the posts, and what the template differences are between the two posts.
