Yes, I have noticed that too, and I agree, not as bad as if it was garbled,
but still an annoyance.

On Fri, Jul 30, 2021 at 1:34 AM Andrei Kulakov <report@bugs.python.org>
wrote:

>
> Andrei Kulakov <andrei.avk@gmail.com> added the comment:
>
> Joakim: by the way, what I was able to reproduce is just a visual bug.
> IOW, the text is still the same and all there in the buffer, but it shows
> up only after a combination of rightward movement and 'a', and a copy of it
> shows up on the left side. So it's not as serious as if the text was
> garbled or impossible to enter or change.
>
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> <https://bugs.python.org/issue42626>
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