Popup window behavior wierd

[Rogerskelamen]

After I mapped <leader>t to <cmd>TranslateW<cr>, every time I type <leader>t, popup window won't appear till I type <esc>(I use <C-[> for substitution). I don't know it's my neovim's problem and I wonder how to fix it, I hope someone can explain the bug. Thanks.

the situation looks like this:

by the way, My bing and youdao translator don't work.

my OS and chip:

MacOS Monterey, M1

my neovim plugins(with packer):

  --
  -- My plugins here
  --
  use "wbthomason/packer.nvim" -- Have packer manage itself
  use "nvim-lua/popup.nvim" -- An implementation of the Popup API from vim in Neovim
  use "nvim-lua/plenary.nvim" -- Useful lua functions used ny lots of plugins
  use {'iamcco/markdown-preview.nvim', run = 'cd app && npm install', cmd = 'MarkdownPreview'}

  -- Colorschemes
  use "sainnhe/everforest"
  use { "catppuccin/nvim", as = "catppuccin" }
  use "folke/tokyonight.nvim"

  -- Statusline
  -- use "Rogerskelamen/eleline.vim"
  -- use 'feline-nvim/feline.nvim'
  use 'beauwilliams/statusline.lua'

  -- Git
  use "kdheepak/lazygit.nvim"

  -- Comment
  use "numToStr/Comment.nvim"

  -- AutoPair
  use "windwp/nvim-autopairs" -- Autopairs, integrates with both cmp and treesitter

  -- Git
  use "lewis6991/gitsigns.nvim"

  -- Translator
  use "voldikss/vim-translator"

  -- Terminal
  use "akinsho/toggleterm.nvim"

  -- cmp plugins
  use "hrsh7th/nvim-cmp" -- The completion plugin
  use "hrsh7th/cmp-buffer" -- buffer completions
  use "hrsh7th/cmp-path" -- path completions
  use "hrsh7th/cmp-cmdline" -- cmdline completions
  use "saadparwaiz1/cmp_luasnip" -- snippet completions
  use "hrsh7th/cmp-nvim-lsp"
  use "hrsh7th/cmp-nvim-lua" -- snippet for nvim lua api

  -- Snippets
  use "L3MON4D3/LuaSnip" --snippet engine
  use "rafamadriz/friendly-snippets" -- a bunch of snippets to use

  -- LSP
  use {
    "neovim/nvim-lspconfig", -- enable LSP
    "williamboman/mason.nvim", -- simple to use language server installer
    "williamboman/mason-lspconfig.nvim", -- combine lspconfig with mason
  }

  -- File explorer
  use {
    "nvim-tree/nvim-tree.lua",
    requires = {
      "nvim-tree/nvim-web-devicons", -- optional, for file icons
    },
    tag = 'nightly' -- optional, updated every week. (see issue #1193)
  }

  -- Telescope
  use {
    "nvim-telescope/telescope.nvim",
    "nvim-telescope/telescope-media-files.nvim"
  }

  -- Build-in ranger
  use "kevinhwang91/rnvimr"

  -- Treesitter
  use {
    "nvim-treesitter/nvim-treesitter",
    run = function()
      local ts_update = require('nvim-treesitter.install').update({ with_sync = true })
      ts_update()
    end,
  }
  use {
    "p00f/nvim-ts-rainbow",
    requires = {
      "nvim-treesitter/nvim-treesitter",
    },
  }