I’d like to see if there has been any progress on this issue I reported some time ago. I’ve discovered a clue that might lead you to the problem. When I save my files with roughly equal sized windows, they open with random window sizes. It’s easy to replicate (at least on my machine: MacPro 6 core, High Sierra 10.13.6).
If I save an empty file with equal 4-view windows (see attachment 01 top) and then reopen the file, it appears as shown at bottom with unequal windows. However…, if I manually reset the windows and then make any window full screen before saving the file, it will open correctly with the same full view window showing. And when I click the 4-view icon, the 4-views are still in their correct locations. (See attachment 02.)
So the problem occurs only when a file is saved with 4 views shown. If I remember to make any of the 4 views full screen before saving the file, I don’t have to reset my windows. But because the file window positions are saved correctly when any view is full screen, that may indicate that some parameter is not being saved properly in 4-view mode.
I hope you can replicate this problem and will address it. I can send a Quicktime movie of the open/save process, but I think it’s fairly clear from the attached images.