Yeah definitely a Qt issue in that case. The only difference between the two dialogs is that the for book info popup calibre only asks qt to restore the dialog's size not its position. I can change the edit metadata dialog to be the same, though am sure this will cause someone else to complain, as now the dialog will be positioned at the operating systems whims, but such is life.
https://github.com/kovidgoyal/calibr...0cfd4ff0520b47