[ubuntu] Compiz - rotate cube - 3 monitors - display issue

Hi Folks,

I'm in Ubuntu 16.04, with XFCE4 ruing.

Now this issue cropped up I think when I upgraded to 15.10, can't recall exactly, but something like that.

I have 3 monitors, and I'm using compiz. I know there are other GPU compositors, but I'm actually loving compiz a lot, so switching at this time is not okay for me.

I use rotate cube to switch between my workspaces a lot. It rotates all monitors separately, not one big cube or whatever.

The issue is when I rotate the cube, each monitor sees the monitor beside it, and spills outside the cube ( http://imgur.com/J4xZht3 ).

Now, in the past the cube only showed THAT monitor it was relevant to, not spilling out and displaying adjacent monitor content.

It's kind of weird to explain, so I hope the graphic helps!

I was hoping that this would be fixed in 16.04, but it looks like this is an unreported issue. Can anyone advise please? I've tried messing with the options in Rotate Cube, but I suspect this is a code bug, not configuration issue.