Elementor Pro comes with a Posts widget that allows you to display the posts on your website by a certain query. There are lots of settings you can set when working with the Posts widget, including the excerpt length. There is a common issue regarding the excerpt length in Elementor. In some cases, the excerpt length setting not working when the page has been published (or previewed), even if the excerpt length has been set.
For instance, you have set the excerpt length to 15. This means, the excerpt length of each post supposed to 15 words.
In reality — once the page is published or previewed — the excerpt length is longer than that (more than 15 words).
We are not sure whether this is a serious bug or not, but it doesn’t happen to all WordPress themes. If you use Elementor’s Hello theme or WordPress’ default themes, you might don’t experience the same issue. The issue usually happens on WordPress themes that have an option to set the excerpt length (not all WordPress themes offer an option set the excerpt length).
So, if you are experiencing the issue of the excerpt length setting not working when working with the Posts widget in Elementor, while you have set it, you can go to the WordPress theme customizer (Appearance -> Customize) to fix the problem. The setting location to set the excerpt length might be vary depending on the theme you use. On the Agency Plus theme, you can go to Theme Options -> Blog/Archive.