bug#41005: problem with rendering Persian text in Emacs 27

[Eli Zaretskii]

On June 4, 2020 6:01:21 AM GMT+03:00, hossein valizadeh 
<valizadeh.ho@gmail.com> wrote:
> Hello,
> 
> 1. This happen with every font that supports Arabic.
> 2. When scale back to zero the problem happen again.
> 
> I attached my emacs-bug-info.
> 
> 
> On Thu, Jun 4, 2020 at 7:09 AM hossein valizadeh
> <valizadeh.ho@gmail.com>
> wrote:
> 
> > Hello,
> >
> > 1. This happen with every font that supports Arabic.
> > 2. When scale back to zero the problem happen again.
> >


Thanks.

What is your version of HarfBuzz?
And what happens if you unset XMODIFIERS, i.e. disable the ibus input method 
framework?