Why Arabic, Persian, Kurdish letters not joined (they should be)?

[shashankaf]

What Operating System(s) are you running on?

macOS

Which Wayland compositor or X11 Window manager(s) are you using?

No response

WezTerm version

WezTerm 20240203-110809-5046fc22

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Some of my projects have right to left texts injected into the UI and I use WezTerm as it has given me the best Terminal experience for that. The only problem I have, while the Terminal with my configuration shows these texts right to left (most other terminals don't), the letters are not joined, as they should be. No choice of font, whether mono or not, helps, I've tried even Arabic and Persian fonts (like Vazir Font Hack). However, the issue remains the same
Here's my WezTerm configuration

local wezterm = require 'wezterm'
local config = wezterm.config_builder()

config.font = wezterm.font 'FiraCode Nerd Font Mono'
config.font_size = 20
config.enable_tab_bar = false
config.window_background_opacity = 0.95
config.macos_window_background_blur = 30
config.window_decorations = "INTEGRATED_BUTTONS | RESIZE"
config.window_padding = {
  left = 10,
  right = 20,
  top = 30,
  bottom = 10,
}
config.bidi_enabled = true
return config

The correct way to disply the text is like this

    if (phone.length < 3)
      setErrors([...errors, "تکایە ژمارەی مۆبایل داخڵ بکە"]);

but WezTerm shows it like this:

Does anyone have any idea how to solve this issue? Thanks in advance

[wez]

I'm not literate in this script, so forgive me for saying that what I see in the browser looks "the same" to me as the screenshot you shared:

Can you share more details on precisely where you're observing the issue? Perhaps by annotating the wezterm screenshot?