The whisper feature has "Block whispers from people you don't follow" on by default. To stop harassment.
I run a stream and sometimes people who are banned from chat can still harass people in chat by whispering to them. Most are not aware that they can turn whispers from people they don't follow off. This is a problem I'm seeing all over twitch after the addition of whisper. It would be more user friendly if it was on by default. Thankyou :)
*the whisper feature should have