bug#58135: 29.0.50; Typing getting garbled in mail-mode

[Eli Zaretskii]

> Date: Mon, 7 Nov 2022 11:08:59 +0000
> From: Robert Marshall <robert@capuchin.co.uk>
> Cc: luangruo@yahoo.com,
>     58135@debbugs.gnu.org
> 
> 
> Eli Zaretskii writes:
>  > Is the wrong order real, or just on display?  IOW, what happens if you
>  > save the buffer to a file -- do you see the wrong order in the file as
>  > well?
>  > 
> 
> I saved a buffer containing garbled "r dehsangul ce" - I typed "rules
> changed" to a file and the contents of the file were as in the buffer
> - so the wrong order was real rather than just being displayed.

That would mean something really changes the input events that Emacs
receives.  Does "C-h l" after this happens indeed shows the characters
in the wrong order?