Recently, some users are reporting that there is an issue about blog articles.
We found that the featured image of the blog article would be gone when the focus keyword or meta description was updated for a blog article. After checking our code, we found that when the article was updated, the featured image would be cleared though we didn’t change it. We were not sure whether this issue was related to the Shopify API.
At the moment, we can’t find a fix for the issue. Users need to manually re-upload the featured image to the article.
We have submitted an inquiry to reach Shopify developer support here: https://ecommerce.shopify.com/c/shopify-apis-and-technology/t/article-featured-image-is-removed-when-i-update-article-title-and-body_html-with-api-544842
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Also published on Medium.