$cordovaSocialShare subject line not working

I’m using the $cordovaSocialShare.share() method and it is working. However, if I want to use any other parameters like the subject it doesn’t work. Only the main message is showing up.

        if (shareMessage && window.plugins && window.plugins.socialsharing) {
            _scope.modalData.share = function() {
                _scope.modalData.sharing = true;
                $cordovaSocialSharing.share(shareMessage, "my test subject").finally(function () {
                    _scope.modalData.sharing = false;
                });
            }
        }

The second parameter “my test subject” is NOT showing up in the native email client but the shareMessage is. Does anyone know why that is?

This is the example from the actual docs:

 $cordovaSocialSharing
    .share(message, subject, file, link) // Share via native share sheet
    .then(function(result) {
      // Success!
    }, function(err) {
      // An error occured. Show a message to the user
    });