Dont Show Folder & Files Name Correctly in Nextcloud 11

i installed nextcloud and connect it to my active directory and my ftp external storage
everythings is correct and work perfectly but some folder and files that are persian didnt show correctly and just show ??? instead of name.
how i can fix this problem ?
the language is persian

Which language is it?

The language is Persian

Did you set the default charset to UTF8 in your php.ini?

default_charset = "UTF-8"

On the local file system, does it work with persian file and folder names?

yes it on utf-8
i figured that, its just ftp problem
when i connected the ftp this problem occured.
but when sync the persian files from my pc everything is fine