Steps

- Select an item

- Open the Gantt and add a duration for that item

- Select another item

- add another duration for that item too

 

You should have 2 items with 2 bars in the Gantt.

 

- Focus back on one of the item's cell (item text) and type something ("test").

- Press enter to validate the entry

 

- Ctrl+Z to undo what you just typed.

The duration of the Gantt will be erased, instead of erasing what you just typed.

 

- Ctrl+Z again to undo.

The other duration you entered is also erased.