In a multi-head MATE desktop environment, how can fullscreen windows be made to respect the dock placement?

I have three displays running with Ubuntu 18.04 LTS (X11) and the MATE Mutiny desktop environment. When I bring a window to fullscreen, the resize of the window does not respect the dock and ends up placing the edge of the window beneath the dock. How can this behavior be changed?

The screenshot below illustrates the window lying behind the dock in the rightmost display of the three displays.