Currently using the post title causes a duplicate issue as the thumbnail and the text are the same. Use the default alt text included by the image settings page and if the alt text is blank then use the post title.
Override flags to be used using filters to override the behaviour to select between alt or post title. And, a flag to choose if fallback is post title or no alt text.
https://github.com/WebberZone/contextual-related-posts/blob/681f60428b523c0ba414fe410ff508527758c75f/includes/media.php#L215
Currently using the post title causes a duplicate issue as the thumbnail and the text are the same. Use the default alt text included by the image settings page and if the alt text is blank then use the post title.
Override flags to be used using filters to override the behaviour to select between alt or post title. And, a flag to choose if fallback is post title or no alt text.