parseCookies error when cookie value has '='

[yes1am]

parseCookies("__qc__k=TC_MK=123123;");

should return: 
{
  __qc__k: 'TC_MK=123123'
}

but return:
{
  '': 'undefined',
  __qc__k: 'TC_MK'
}

This is not the same as the Chrome result, see the Chrome screenshot below:

Then the value of the cookie was right, so I migrated the code