try this .. go to your articles click the 3 dots on the left side of your unpublished articles and click edit articles. and republished again. i have experience like this and thats what i do. hope it can help you. I hope you subscribe me back friend.

Maybe the site's bot flagged your article as something that violates their rule. It might be that you forgot to give credit to the source of your lead picture, or you've copied the article from the net. Just be careful on copying articles because it would lead on banning your account here