First post dissapeared

My first blog post, sticky or not, dissapeared and nothing gets it back. It shows in the admin with the full text and the title shows in the last blog posts. I wondered if a hacker entered my site by subscribing at the start, before posting. I saw his username in the forum were the post text was missing but only the title appearing. WHen clicking on the “Original blog read” Its empty with the tile and tags and categories and link to forum.

I tried to deactivate all plugins: See below.

I even copied the text into a new post I created, with the same title but a 2 at the end. But with the same result: Only the title is visible and the links and tags under the post body. I tried submitting a new post and it was no problem. I don’t understand if it can be in the html of the text. I tried removing the image at the top but nothing changed.

I have the simple press forum plugin, the all in one seo plugin and akismet plugin. The SEO I activated yesterday so I thought that was the problem. But I thought it might have got to do with the forum plugin since I perhaps deleted the duplicate in the forum. I had linked the blog to the forum.

Please help

PS: It is bothersome. This sudden problem stole half a day from me so far. Tech problem = cause of 1/3 of all the stress in the world. SUperusers go home, your hypochondric needs make the world a hell for all others due to bugs, lack of overview of programs that originally just covered simple and IMPORTANT functions. Not all that unneccesary snot that we less eccentric people have to bother with always. Tech problems seem to be hell. DId you ever think about that? People who like those problems must in my opinion be one or both of these ..

1) Be extremely monotonous of taste and lacking creativity
2) Be Sadomasochists

What a relief saying that out loud