Thank you Jack,
the proposed workaround works so far. But that can not be a permanent solution. The problem with the BNFW excerpt shortcode only occurs in conjunction with BNFW. On my blog page the excerpt is processed correctly. Below, I submit a test notification. It clearly shows that the shortcode of the foo gallery is not removed. The default value for the excerpt is 50 words, and was not changed by me. The text of my post is 51 words. Nevertheless, the formation of the excerpts does not end with the 50th word, but also takes over the shortcode of the gallery.
This is not the standard behavior of wordpress. I hope you can help me.
My test results:
This is the content of Parameter [ post_title ]:
NotificationTest
This is the content of Parameter [ post_excerpt ]:
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Proin in nulla et felis sollicitudin dictum. Nullam non ultricies quam. Nunc maximus lacus ac ipsum scelerisque ultricies. Ut maximus lobortis nibh a mattis. Class aptent taciti sociosqu ad litora torquent per conubia nostra, per inceptos himenaeos. Nam a faucibus ex. Suspendisse leo. [foogallery id=”11819″]
This is the content of Parameter [ permalink ]:
https://www.mein-familienkreis.eu/index.php/2017/11/05/notificationtest/
This is the content of Parameter [ post_date ]:
2017-11-05 14:02:47