[Bug] <leader> doesn't work in diff4_mixed view

[guru245]

Description

When <leader> is set to space key, it doesn't work in diff4_mixed view. Instead, space key is recognized. If <leader> is set to \, the default, <leader> is working as expected. Therefore, I can proceed with the diffview mappings starting with <leader>.

Expected behavior

No response

Actual behavior

The behavior is described in the description section above.

Steps to reproduce

In .gitconfig

[mergetool "diffview"]
    cmd = nvim -n -c "DiffviewOpen" "$MERGE"

In init.lua

vim.g.mapleader = ' '
vim.g.maplocalleader = ' '

1. Make a git conflict.
2. git mergetool
3. Diffview is opened
4. Press <leader>

Health check

Output of :checkhealth diffview

==============================================================================
diffview:                                   require("diffview.health").check()

Checking plugin dependencies ~
- ✅ OK nvim-web-devicons installed.

Checking VCS tools ~
- The plugin requires at least one of the supported VCS tools to be valid.
- ✅ OK Git found.
- ✅ OK Git is up-to-date. (2.34.1)
- ⚠️ WARNING Configured `hg_cmd` is not executable: 'hg'

Log info

Relevant info from :DiffviewLog

[INFO  2025-05-11 12:39:49.520 +0900] ...al/share/nvim/plugged/diffview.nvim/lua/diffview/lib.lua:24: [command call] :DiffviewOpen 
[INFO  2025-05-11 12:39:49.704 +0900] ...iffview.nvim/lua/diffview/scene/views/diff/diff_view.lua:488: [DiffView] Completed update for 8 files successfully (86.617 ms)

Neovim version

NVIM v0.11.1
Build type: Release
LuaJIT 2.1.1741730670

Operating system and version

Linux 5.15.167.4-microsoft-standard-WSL2 x86_64 GNU/Linux

Minimal config

-- #######################################
-- ### USAGE: nvim --clean -u mini.lua ###
-- #######################################

local root = vim.fn.stdpath("run") .. "/nvim/diffview.nvim"
local plugin_dir = root .. "/plugins"
vim.fn.mkdir(plugin_dir, "p")

for _, name in ipairs({ "config", "data", "state", "cache" }) do
  vim.env[("XDG_%s_HOME"):format(name:upper())] = root .. "/" .. name
end

local plugins = {
  { "nvim-web-devicons", url = "https://github.com/nvim-tree/nvim-web-devicons.git" },
  { "diffview.nvim", url = "https://github.com/sindrets/diffview.nvim.git" },
  -- ##################################################################
  -- ### ADD PLUGINS THAT ARE _NECESSARY_ FOR REPRODUCING THE ISSUE ###
  -- ##################################################################
}

for _, spec in ipairs(plugins) do
  local install_path = plugin_dir .. "/" .. spec[1]
  if vim.fn.isdirectory(install_path) ~= 1 then
    if spec.url then
      print(string.format("Installing '%s'...", spec[1]))
      vim.fn.system({ "git", "clone", "--depth=1", spec.url, install_path })
    end
  end
  vim.opt.runtimepath:append(spec.path or install_path)
end

require("diffview").setup({
  -- ##############################################################################
  -- ### ADD DIFFVIEW.NVIM CONFIG THAT IS _NECESSARY_ FOR REPRODUCING THE ISSUE ###
  -- ##############################################################################
})

vim.opt.termguicolors = true
vim.cmd("colorscheme " .. (vim.fn.has("nvim-0.8") == 1 and "habamax" or "slate"))

-- ############################################################################
-- ### ADD INIT.LUA SETTINGS THAT ARE _NECESSARY_ FOR REPRODUCING THE ISSUE ###
-- ############################################################################

print("Ready!")