DefaultButton is triggered on ENTER in fields where the ENTER key has been mapped/trapped.

[fabriciomurta]

Related forum issue: Window Close Issue

On the sample the user provided:

1. Click the '+' button next to P.O.Box textfield.
2. Focus (or type something) the search textfield on the window that appears
3. Hit the 'enter' key.

Although the textfield has the 'enter' key bound for something else via KeyMap, it also triggers the window's DefaultButton (which, as it is not defined, is 'Cancel').

The problem is in Container.js, where the overrode Ext.container.Container's fireKey function does not consider any possible key mapping override to the enter key in the current event's target (actually the source where the 'enter' keypress came from).

It is necessary to track down the reason of this override and check if it is still actual. As of version 5.1.1, there are no fireKey on Ext.containter.Container.