I use a laptop with an attached 24" display.
I save a workspace with a particular layout of panes and close and Accordance. On reopening the workspace the library pane is often very narrow on the left and the ID pane at the bottom is often very thin. Now before saving I had resized them to the size I like. Resizing like this does not cause the File -> Save action to be active so I'll either use File -> Save As and overwrite the existing workspace file or I'll change something else like a search tab entry and then I save the workspace. But even so, on reopening, while it remembers which monitor it should be opened on Accordance, it does not reproduce the pane sizes of the the ID and library. I presume the other panes are also not sized precisely as they were because the overall window size fills the monitor still.
This does not appear to be an issue - or perhaps not as much - on the Mac. I am not 100% sure that this is peculiar to the external display but a quick test indicates that the laptop's internal display does not have this problem. Perhaps that is why I do not see it on the Mac as it only has one display.