Why do my email messages stop typing and display a blue circle?

[Windows Central Question]

When typing a message my keyboard stops responding and shows a blue (thinking) circle.

 

[rhapdog]

It's pretty hard to assist when that's all the info we have.

Please try registering for an account and providing us a bit more information in this thread.
What device are you running? Is this a phone? Tablet? Desktop? Laptop? What model device? What version OS are you running? What email program are you using?