No, I am very clear about my testing process. When I log out and have tested it in different browsers, I can add the “?preview=anyword” to the URL to see the full content of the article.
I also posted on wordpress.com support for help
https://en.forums.wordpress.com/topic/questions-about-seeing-the-full-article-content-without-logging-into-the-website/
The last reply also said that he could see the full content of the article during the test, so he suggested me to ask on wordpress.org support.
Maybe you should test it again, I hope you can help, thank you
