Miss some groups in "add"- or "search" field

Nextcloud version (eg, 20.0.5): 27.0.0
Operating system and version (eg, Ubuntu 20.04): Ubuntu 22.04
Apache or nginx version (eg, Apache 2.4.25): nginx
PHP version (eg, 7.4): 8.0

Unfortunately some groups - not all - were not showed in the add- and search field.
How can I fix it? The well known UTF8-Hack isn’t my solution.