BUG: Proportion before opening NeoTree is not kept

[Kaiser-Yang]

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• I have read all the docs.
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• I have searched the existing discussions.

Neovim Version (nvim -v)

0.10.1

Operating System / Version

WSL2 + Ubuntu 22.04 LTS

Describe the Bug

When there are more than one window, then open neo-tree, the original proportion will not be kept.

Screenshots, Traceback

No response

Steps to Reproduce

1. Open two windows, their sizes are equal:

3. Open neo-tree, after this, window 1 and window 2 have different sizes:

Expected Behavior

An option for keeping the original proportion

Your Configuration

-- DO NOT change the paths and don't remove the colorscheme
local root = vim.fn.fnamemodify("./.repro", ":p")

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

-- bootstrap lazy
local lazypath = root .. "/plugins/lazy.nvim"
if not vim.loop.fs_stat(lazypath) then
  vim.fn.system({ "git", "clone", "--filter=blob:none", "https://github.com/folke/lazy.nvim.git", lazypath, })
end
vim.opt.runtimepath:prepend(lazypath)

-- install plugins
local plugins = {
  "folke/tokyonight.nvim",
  -- add any other plugins here
}

local neotree_config = {
  "nvim-neo-tree/neo-tree.nvim",
  dependencies = { "MunifTanjim/nui.nvim", "nvim-tree/nvim-web-devicons", "nvim-lua/plenary.nvim" },
  cmd = { "Neotree" },
  keys = {
    { "<Leader>e", "<Cmd>Neotree<CR>" }, -- change or remove this line if relevant.
  },
  opts = {
    -- Your config here
    -- ...
-- Use default
  },
}

table.insert(plugins, neotree_config)
require("lazy").setup(plugins, {
  root = root .. "/plugins",
})

vim.cmd.colorscheme("tokyonight")

[Kaiser-Yang]

This is what I have did to solve this:

                {
                    event = 'neo_tree_window_after_open',
                    handler = function(_)
                        vim.cmd('wincmd =')
                    end
                },