Steps to reproduce:

 

1- press win-n to have the add item dialog appear

2- write something in the "item text" text box

3- write something in the "Other fields" text box (this step might be unnecessary)

4- add item to the database

 

Back to IQ (using alt-tab, or whatever): keyboard shortcuts like F5, F2, etc. don't work anymore until I click on another grid tab and back again.