Hello,
We apologize for the issue you are facing with the social image share not working on some pages. There are a few reasons why this might be happening, especially with specific post types like Projects and News. Here are some steps you can take to troubleshoot the problem:
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Check if Images are Added: Ensure that you have added Facebook/Twitter sharing images through the Rank Math Meta Box for those specific posts. You can do this by editing the post and looking for the social options in the Rank Math settings.

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Image Dimensions & Format: Verify that the images you are using meet the recommended dimensions of 1200px X 630px and are in a supported format (JPEG, PNG, GIF, WebP, or AVIF). If the dimensions are too small or too large, social networks may not display your desired image correctly.
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Set Default Open Graph Image: If you haven’t set a default Open Graph image, you can do so by navigating to WordPress Dashboard → Rank Math → Titles & Meta → Global → OpenGraph Thumbnail. This will serve as a fallback if individual images are not set.

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Clear Cache: If you are using any caching plugins, clear your cache to ensure that the latest changes are reflected.
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Testing on WhatsApp: Sometimes, WhatsApp may cache old data. You can try sharing the link in a new chat or use the WhatsApp Debugger to refresh the link preview.
If these steps do not resolve the issue, please reply to this ticket with your site URL and any additional details about the specific posts that are having trouble. A human agent from our support team will then assist you further.
Thank you for raising this concern!
Sources:
Open Graph/Social Preview Image Is Not Displayed » Rank Math
Open Graph/Social Preview Image Is Not Displayed » Rank Math
Hello,
The WhatsApp platform has a limit on the size of the image, and it works best for images that are below 300Kb in size, even though it’s possible that some images above that might show sometimes, but it’s very finicky and not consistent.
The preview links on WhatsApp have a limitation set by the application that is not set by other platforms such as Facebook.
Looking forward to helping you.
Hello,
Since we did not hear back from you for 15 days, we are assuming that you found the solution. We are closing this support ticket.
If you still need assistance or any other help, please feel free to open a new support ticket, and we will be more than happy to assist.
Thank you.