dragging to another virtual desktop is not working

[Sega-Zero]

dragging to another desktops fails if the titlebar contains subviews. If you create another desktop in mission control, and then try to drag the window + desktop switching (by Ctrl + right/left) - the window is left on the previous desktop.
Dragging works correct if there is no subviews are placed in the titleBarView.

In the demo the main window works fine, but new window controller is not working as it should