First image, Schema problem

Hello, my website does not have a featured image on some post.

i am very glad to see this development, but not working.

Structured Data Testing Tool image error but same post added featured image no problem.

Will there be more improvement?

Image improvements
As mentioned in the release post of Yoast SEO 11.1, we’ve been working on a better way to pick images correctly for use in the generated structured data. In this release, we’re introducing a new way to make sure we always include an image in the structured data. Now, we pick the first image in the content for the Schema output if you haven’t set a featured image.