Cannot focus a disabled or invisible window error after closing the Describe Table window. (27919)

I type in a table name in the sql editor. Hit F4 to describe the table. Hit the "DATA" tab, my data comes up OK and I close the form. After closing the window, an error message pops up

"Cannot focus a disabled or invisible window".

View | Toad Options | Schema Browser | Data and Grids | Set focus to grid after selecting table, view, or snapshot - is checked

WORKAROUND:
Uncheck - View | Toad Options | Schema Browser | Data and Grids | Set focus to grid after selecting table, view, or snapshot

STATUS:
Issue fixed in version  9.1. The latest version of  Toad for Oracle  can be downloaded at: https://support.quest.com/download-product-select