I have dual monitors. I normally have Fusion open on the left monitor and maximized. When I move it to the right monitor and maximize it, the ribbon jumps over to the left monitor. If I leave it on the right monitor, but restore the window down, the ribbon comes back to the right monitor.
I have the same setup at home and at work and it does it in both places.
Here is what it looks like when maximized on the Right monitor.