Георгий Потапов via "Bug reports for GNU Emacs, the Swiss army knife of
text editors" <bug-gnu-emacs@gnu.org> writes:

Hi Georgij,

> I edit my files in cp1251 encoding.
>
> This works fine on local host but when I save files on remote host
> using tramp it resets encoding to utf-8 constantly.

Thanks for the report. I could reproduce the problem locally.

It took me a while for debugging, but finally I could fix it. It was a
stupid scoping error when changing something between Emacs 28 and Emacs
29. The fix, which works for me, is appended.

It is a little bit tricky to install the patch, because it is in a
defmacro of tramp.el. This macro is used in tramp-sh.el. You must
compile both files in this order. Could you pls check?

Best regards, Michael.