Wacom pen devices' cursor does not working at all with 3 monitors activated.

I downloaded MouseMux and tried it on Trial / Free mode.

There are 3 monitors: 2 generic monitors and 1 monitor-tablet Cintiq 22.

And 3 mouse devices: a mouse, a pen tablet, a monitor tablet.

MouseMux works when I have 2 monitors activated (e.g. Monitor 1+2 or 1+2/3 duplicated), no matter one or both pen device connected.

And does not work at all when I have all 3 monitor activated (1+2+3).

Cintiq 22's cursor will be locked on the edge of either monitor or not show at all, pen buttons are not working neither.

Arrange the monitor position does not help.

I'd like to buy MouseMux if the issue got fixed.