Field "depends" doesn't take NodeInterface "index" into account

Ext version tested:

• Ext 5.1.0

Browser versions tested against:

• Chromium 37.0.2062.120 Ubuntu 12.04 (281580)

DOCTYPE tested against:

• Strict & Quirks

Description:

• A calculated field defined as dependent to Ext.data.NodeInterface "index" doesn't get recalculated on "index" change


• Sencha Fiddle : http://ift.tt/1NTw92p

Steps to reproduce the problem:

• Open Fiddle & run it.

The result that was expected:

• In the fiddle attached I expect to get node #12 "wbs" field recalculated (should have "1.2").

The result that occurs instead:

• Node #12 "wbs" field doesn't get updated.

Field "depends" doesn't take NodeInterface "index" into account