Count chars field not working

[wet pagoda]

I want to create a column that shows the length of the field title:

 TextColumn::make('Title')
      ->formatStateUsing(function ($record) {
          $length = strlen($record->title);
          return "<b>{$length}</b> /" . LENGTH_TITLE;
      })
      ->html(),

[scarlet shard]

TextColumn::make('title')
  ->formatStateUsing(fn (string $state): string => strlen($state))

[wet pagoda]

Thanks!