I created individual excerps for different pages and included the content as the first paragraph with the respective block. And it worked for a long time. Suddenly all pages show the excerpt of the oldest post. When I deleted the excerpt of the oldest post, all pages show the first paragraph of the oldest post. When I enter an empty paragraph as the first paragraph in the oldest post, all pages show the excerpt of the second oldest post. The same with the third oldest post. To find an interim solution I wrote the title of the Website in the excerpt and now it is repeated on every page.
Posts don’t have the same problem. They show the individual excerpt as they should.
https://tellerrandstories.de/reiseatlas/laender/
and the linked pages all show “Tellerrand-Stories” which is the excerpt or the first paragraph (either has the same consequence) of
https://tellerrandstories.de/food/safran-gold/
although I don’t use the respective block in this post