koeln, the problem is only visible in the ‘Write Post’ section; you’d have to be logged in as admin to see it.
The code which appears in ‘view source’ for the faulty blog’s post.php is copied into TXT here:
https://machinegunkeyboard.com/mgk_post_viewsource.txt
The source for a working installation looks like this:
https://machinegunkeyboard.com/shao_post_viewsource.txt
Thanks for your reply ??