After loading my layout that was saved with unpinned panes, I notice that these panes are not loaded as 'unpinned'. Moreover, these panes no longer seem dockable.
When I look at the generated XLM, I see that IsDockable="False" and that there's nothing to indicate that the pane is unpinned (ie. IsPinned="False"). Is this a bug? How can I take care of this?