I just checked the filemanager for a Nextcloud 27.0.2 app instance and found out that I have a file called
htaccess(no dot at the beginning of the file). After checking this from the terminal, I indeed see a
../data/htaccessfile. It's not a display bug of the Filemanager.
I found no related issue for Nextcloud so is this a problem of the NextCloud setup/template by Cloudron? Of course this is unlucky then because it means it was ignored.
The htaccess from
/app/data/htaccessis linked into the app code folder https://git.cloudron.io/cloudron/nextcloud-app/-/blob/master/Dockerfile#L69