Indentation(AutolistTab) is not same with tabstop option

[Jaehaks]

Thank you for your efforts

I set options tabstop and shiftwidth to 4. It works when I disable autolist plugin.
But the first indentation's tabstop is 3 and this behavior is invoked when I erase the tab.
After first indentation, the other indent with TAB does work normally ( 4 spaces )

It is my configuraiton

config = function ()
  local autolist = require('autolist')
  autolist.setup({
  
  })
  
  local User_markdown = vim.api.nvim_create_augroup('User_markdown', {clear = true})
  vim.api.nvim_create_autocmd('FileType',{
    group = User_markdown,
    pattern = {'markdown', 'text'},
    callback = function ()
      local opts = {noremap = true, buffer = 0}
      vim.keymap.set('i', '<TAB>'     , '<Cmd>AutolistTab<CR>'             , opts)
      vim.keymap.set('i', '<S-TAB>'   , '<Cmd>AutolistShiftTab<CR>'        , opts)
      vim.keymap.set('i', '<CR>'      , '<CR><Cmd>AutolistNewBullet<CR>'   , opts)
      vim.keymap.set('n', 'o'         , 'o<Cmd>AutolistNewBullet<CR>'      , opts)
      vim.keymap.set('n', 'O'         , 'O<Cmd>AutolistNewBulletBefore<CR>', opts)
      vim.keymap.set('n', '<leader>mn', '<Cmd>AutolistCycleNext<CR>'       , opts)
      vim.keymap.set('n', '<leader>mr', '<Cmd>AutolistRecalculate<CR>'     , opts)
      vim.keymap.set('n', 'dd'        , 'dd<Cmd>AutolistRecalculate<CR>'   , opts)
      vim.keymap.set('v', 'd'         , 'd<Cmd>AutolistRecalculate<CR>'    , opts)
    end
  })

end