Thanks for reporting this.

This usually happens when the auto-generated excerpt/preview text is created from content that includes shortcodes, block markup, or HTML that gets stripped without preserving spaces. As a result, some words can appear “stuck together” in the preview.

A couple of quick checks:

Are these previews generated from Classic Editor content, Gutenberg blocks, or a mix?

Does it happen on all posts, or only on posts that include specific elements (tables, buttons, shortcodes, custom blocks)?

In many cases, updating to the latest theme/plugin version resolves it, as excerpt sanitizing has been improved in recent updates. If you’re already up to date and the issue persists, please share:

A URL where it happens

One example post ID (or the content type)

and we can pinpoint the exact cause and suggest the cleanest fix.