Problem with Window Restore in new version 27

I have just upgraded to version 27.0.469.0 and have discovered that if the main desktop is minimized to the taskbar by clicking the minimize button on the top right of the window, it will not restore. To get it back I have to right click the icon in the taskbar and select Close Window and then select cancel when the exit program dialog prompting to backup appears. The window will then restore normally.

A similar thing occurs when minimizing a pop-up window such as the Supplier Record window, but this can be restored by right clicking its icon in the taskbar and selecting Restore.

If I minimize the program desktop when a pop-up window is also open such as the Supplier Record, then the window restores properly.

Has anyone else got this problem, or is it an issue with my installation?