When composing a post, you can encounter the following issue: metadata is not detected via URL.
In this case, the image is not detected, and the title and description are not populated in the corresponding fields of the post.
We recommend using the Facebook debugger https://developers.facebook.com/tools/debug/, to understand what the issue could be.
For example, if the following message appears:
Missing Properties: The following required properties are missing: og:type, og:image
This means that Facebook can't find the properties in question. In fact, Facebook uses the OG properties to generate your preview (with metadata).
In this case, you will need to update what is added to the OG:image and OG:type.