Steps to reproduce:
1. Start portal and login.
2. Go to Control Panel > Configuration > Custom Field > Blog.
3. Add a custom field (text).
4. Go to Content & Data, add a blog with any content and insert a image, and also fill the custom field.
5. Publish the blog.
The blog can be published.
Two blogs are listed there, one is "draft".
I found this during testing 7.2 FP9 (build4) FixPack bundle, and seems it is not 100% reproducible.