Whenever we've heard similar problems, it's been traced to using a dual or multiple monitor setup. Or to changing your computer's, or computer screen's orientation. Or using a quite uncommon resolution.
Any of those ring a bell?
Video or animated GIF would still be helpful. Meanwhile, I'll try to search out the relevant bug report, in case it might have some helpful info for you.
Edit
Are you using a graphics tablet, by any chance? Somehow people often forget to mention that.
Edit #2
Unfortunately, I've found so many bug reports on issues with dual or multiple monitors, and most containing enough technical language that I don't clearly understand, I can only suggest
this search, or else make your own search
I'll try a couple more searches myself....