Why is the support AI chatbot always broken?

One item with the current method of support,  When you are finally in queue to chat with a person, it mentions you are in queue. But when the person finally comes online- there is no bell or flashing lights to let you know that they are finally there.  I'm off on another window doing other work and may not notice that there a new item in the chat window that someone is finally there.  

I've missed chatting because I did not notice they were there.  After having been in queue for more than 20 minutes - this is very frustrating.