I have Audacity 2.2.2. on Windows 10 on a Surface Pro.
14:32:37: Report generated to: C:\Users\GRAHAM~1\AppData\Local\Temp\Audacity_dbgrpt-9668-20181211T143158.zip
Briefly: The screen does not follow the cursor once the cursor is out of sight. Sound playback continues, but obviously it is not possible to see where it has got to. Consequently it is necessary to stop the cursor as it approaches the right hand side and reposition the screen so that the cursor is now on the left hand side. Apart from that everything works as normal. This problem has only happened today.