What do Neo tree attaches something to lsp every time it is opened?

[Demianeen]

I like my editor to be as clean as possible so I set on neo_tree_buffer_leave event to close it:

{
  event = 'neo_tree_buffer_leave',
  handler = function(_)
    vim.cmd('Neotree close')
  end,
}

And it works fine until I added the file_renamed event:

{
  'nvim-neo-tree/neo-tree.nvim',
  opts = function(_, opts)
    vim.list_extend(opts.event_handlers, {
      {
        event = 'file_renamed',
        handler = function(args)
          local old_name = args.source
          local new_name = args.destination
          local stat = vim.loop.fs_stat(new_name)
          if not stat then return end
          local type = ({ file = 'file', directory = 'folder' })[stat.type]
          local clients = vim.lsp.get_active_clients({})
          for _, client in ipairs(clients) do
            if check_folders_contains(client.workspace_folders, old_name) then
              local filters = vim.tbl_get(
                client.server_capabilities,
                'workspace',
                'fileOperations',
                'didRename',
                'filters'
              ) or {}
              for _, filter in pairs(filters) do
                if
                  match_file_operation_filter(filter, old_name, type)
                  and match_file_operation_filter(filter, new_name, type)
                then
                  client.notify('workspace/didRenameFiles', {
                    files = {
                      {
                        oldUri = uri_from_path(old_name),
                        newUri = uri_from_path(new_name),
                      },
                    },
                  })
                end
              end
            end
          end
        end,
      },
    })
  end,
}

With it, every time the neo tree is opened vtsls(lsp) is reinitialized:

CleanShot.2024-01-12.at.05.26.02.mp4

If I remove the on-rename handler everything works perfectly:

CleanShot.2024-01-12.at.05.41.57.mp4

But as far as I see in the rename handler, it does not attach to any lsp. Does anyone know why could this happen?