I am running Excel version 1701 build 7766.2099 on a Windows 10 pro system version 1607 build 14393.1593.
It took me awhile but I am finally able to replicate the issue without fail.
If I close Excel when it is maximized, the next time i open Excel and try to either "restore down" with the button or grab the menu bar and drag it from being maximized the inner excel window is separated from an empty excel "shell" with much flashing of
my monitor. If i then close excel (less than maximized) and reopen it I can maximize, minimize or restore down without issue. BUT i must close excel at less than maximized every time or the issue returns.
It appears that a child window is being extracted from the parent window...before i get flamed, I know there is no MDI since excel 2013 but that is exactly how it reacts except that the parent window is unable to be moved in this case. If i open multiple
workbooks they all open separately, as they should, but if the last workbook to be closed is maximized i get the issue on the next opening of excel.
I have tried repair and uninstall/install of excel but am hesitant to remove office and reinstall completely. I have done quite a bit of searching on the internet and haven't found a single person with my exact problem.
Any suggestions would be greatly appreciated!!!