Hello,
I have Logitech mousse (performance MX) and Windows 8.1 64.
I have the same behavior with and without official mousse drivers. Let me explain, when I posted about it on my mouse driver was the Windows 8.1 driver. I then downloaded the driver from Logitech web site, and the result is the same.
To return to your question Alex, to find the mouse pointer, I close Sonar X3 and restarts. In fact, the pointer disappears just in Sonar X3 not in Windows 8.1.
Cheers