Post excerpt does not work after a certain number of posts

Hi, I’ve used this plugin to create a custom skin for my posts. Within my custom skin, I’ve included the ‘post excerpt’ widget. When I apply this custom skin to the post widget, the post excerpt does not work for any posts published from 1 April 2020 or prior. To be more specific, the post excerpt only shows up to the most recent 25 posts. The post excerpts do not show for any posts older.

When I created my custom skin, I also tried using the ‘text editor” widget and applied the ‘post excerpt’ dynamic value. This results in the same issue (ie, any posts from 1 April 2020 does not the show post excerpt). I don’t want to use the ‘post summary’ dynamic value as this content is different from my post excerpt.

I’ve checked and all posts definitely have an except in each individual posts.

The site is using a child theme of the OceanWP theme.

I am using this plugin on a staging site (via WP Staging Pro). Not sure if this is the cause of the above issue, but I don’t think it would have an impact.

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