Exception on multimonitor system

[NickWard]

Using the window behavior on existing window.

System.OverflowException: Arithmetic operation resulted in an overflow.
   at MahApps.Metro.Native.UnsafeNativeMethods.GET_X_LPARAM(IntPtr lParam)
   at MahApps.Metro.Behaviours.BorderlessWindowBehavior.HwndHook(IntPtr hWnd, Int32 message, IntPtr wParam, IntPtr lParam, Boolean& handled)
   at System.Windows.Interop.HwndSource.PublicHooksFilterMessage(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
   at MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)

[AzureKitsune]

What did you do to cause the exception?

[NickWard]

I'm not sure. I have loads of windows open on a rdp session that spans 4 monitors.