When using the listsubscribe API endpoint, submitting an email address with a plus sign (+) in it causes the API to return the following error:

1. {"code":"2004","message":"Invalid Contact Email address.","version":"1","uri":"/api/json/listsubscribe","status":"error"}

Is there anything that can be done about this?

Example contactinfo post:

1. {"First Name":"William","Last Name":"Last","Contact Email":"test+william@gmail.com"}