I'm using Q2A with WYSIWYG Editor v1.1.1, and there's a problem with special characters like German umlauts (ä,ü,ö). For some reason, when a question gets posted, there's a double conversion to html:
ü in the WYSIWYG editor becomes &uml; in the source code. So in the end, ü is rendered as ¨
I initially had a warning on the admin pages that my version of php does not support multibyte strings. Now our system administrator has added the packages php7.4-mbstring, php7.4-intl und php7.4-pspell, and the warning is gone. However, the problem I have just described persists.
What other possible sources of this unfortunate behaviour could I investigate?
Further Information (2021-06-08):
A(n awkward) work-around for the problem is to include some LaTeX-snippet in the text. Umlauts are displayed perfectly in posts that contain LaTeX.