As I am typing, the cursor will pop to the top of the block I'm writing and continue on as if I've deliberately clicked myself into that position. I have to first delete these randomly placed characters, and then click back down into the sentence I was typing to resume my thought. It's not doing it in any of my applications, though, such as Word, or even this post. I have to think it is some bizarre behavior that is occurring just in Hub.
I haven't timed this to see how often this is happening, but it seems to be every few minutes. At first I thought I had stuck key or was somehow performing a combination of keystrokes to reposition my cursor. It's happening too frequently to be operator error, though.