php League CSV导入时无效的字符串

I am importing a csv file with php League peckage, on import it prepends a character b outside the double quotes of string and this breaks the MySQL query for that column.

I have tried rtrim and str_replace but none of that helps

$csv = Reader::createFromPath($data, 'r');
$header = $csv->fetchone();
$stations = $csv->setOffSet(1)->fetchAssoc($header);

I expect the output as following

array:1 [
  0 => array:9 [
    "station_name" => "HASAN KARACA - - N KOLAY BRANCH"
    "phone" => "123456"
  ]
]

But the actual out is

array:1 [
  0 => array:9 [
    "station_name" => b"HASAN KARACA - - N KOLAY BRANCH"
    "phone" => "123456"
  ]
]

Please note there is b in station_name which shouldn't be there.