I-Beam insertion curson goes missing occasionally I bought this new Macbook Air, and am completely new to Mac OSX. 
I have Mac Sierra installed, and lately have noticed that the The I-Beam insertion cursor for the keyboard goes invisible occasionally. Maybe there's a shortcut or a trackpad problem, I'm not sure. Thought I could ask here.

Thanks for any help!
This is standard macOS behaviour.

The I-Beam cursor ought to go invisible as you start to type &amp; only reappear if you stop typing &amp; move the cursor.