utf 8 in scripting terminal window

I know this is talked about in some threads before, but i found no real solution
to my question

while you say in the documentation that winscp defaults to utf-8 i cannot agree with that

writing some german chars and redirecting them to a file with "echo äöüß > testumlaute.txt"

results in

XXX@myserver.de ~ $ hexdump -C testumlaute.txt
00000000 e4 f6 fc df 0a |.....|
00000005

checking which encoding this is results in

>>> chardet.detect(chr(0xe4)+chr(0xf6)+chr(0xfc)+chr(0xdf))
{'confidence': 0.99, 'encoding': 'windows-1255'}


cp1255 is not utf-8.

this was tested with a freshly installed winscp 5.7, which was mentioned as using utf8
per default if i read it right?

So how can I configure winscp to use utf-8 for the whole communication?

locale is /root$ locale
LANG=de_DE.utf8
LANGUAGE=
LC_CTYPE="de_DE.utf8"
LC_NUMERIC="de_DE.utf8"
LC_TIME="de_DE.utf8"
LC_COLLATE="de_DE.utf8"
LC_MONETARY="de_DE.utf8"
LC_MESSAGES="de_DE.utf8"
LC_PAPER="de_DE.utf8"
LC_NAME="de_DE.utf8"
LC_ADDRESS="de_DE.utf8"
LC_TELEPHONE="de_DE.utf8"
LC_MEASUREMENT="de_DE.utf8"
LC_IDENTIFICATION="de_DE.utf8"
LC_ALL=

Thanks and
best regards

It works for me:

$ hexdump -C testumlaute.txt
00000000 c3 a4 c3 b6 c3 bc c3 9f 0a |.........|
00000009

Please attach a full log file showing the problem (using the latest version of WinSCP).