Typing Indicator isn't working in Teams Channel

I have a client that uses Teams on a regular basis. When they are just chatting individually, they get a typing indicator. However, when they are in a Teams Group or a Team-Specific Chat Channel, the typing indicator is not working, not communicating to others that someone has a comment or question. 

Is this a feature that is not available in these groups? I searched quite a few pages without finding an answer. 

I did find this and they had less than 20 people: