Guest mouse malfunctions in multiscreen environment

[bmc0010]

Whenever I move the guest window to another monitor the mouse always hits an invisible barrier inside the window as if its run into the top or side of the window. The x-y coordinates that it decides is a barrier seems arbitrary. The guest mouse stops but then reappears outside the guest window as if Rt Ctrl had been pressed and freely roams outside the guest window until you move back into the guest window at which point the mouse begins function inside the guest window again until you move back to the invisible barrier again.

Reproducible every time the guest window is moved away from the primary monitor. Size of guest window does not matter, symptoms appear 100% of the time outside the primary monitor.

[bmc0010]

Logfile