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I only found this secret new feature (I hope Accordance isn't reading this!!) when (1) once again the layout saver can't remember the state on the RI ribbon and (2) the new active layout routine (I assume) won't allow moving the panel boundaries on any of my 5 windows after I've tried to fiddle with the RI ribbon's bad-boy behavior.
The above is after a Logos5 load while another software loaded faster (leaving a third piece of software showing below .... beloved Libronix of course). Obviously Logos5 doesn't do a repaint to account for its slow load times.
Same thing happens on the layout menuing.