Problem startEditingNew / groupBy since smartgwt-6.0p.zip of 2016-03-30

[rfa]

Hi,

Since smartgwt-6.0p.zip versions 30.03.2016 I have this error when
i try to do a startEditingNew with ListGrid to groupBy.

*16:59:54.645:MUP3:WARN:Log:com.google.gwt.core.client.JavaScriptException: (TypeError) : Cannot read property 'itemID' of null
    at wrap_1_g$(showcase-0.js@5:42990)
    at doFire_0_g$(showcase-0.js@20:34737)
    at fireEvent_1_g$(showcase-0.js@8:34807)
    at fireEvent_0_g$(showcase-0.js@24:34585)
    at fireEvent_4_g$(showcase-0.js@30:50814)
    at anonymous(showcase-0.js@16:93226)
    at apply_0_g$(showcase-0.js@28:10845)
    at entry0_0_g$(showcase-0.js@16:10901)
    at anonymous(showcase-0.js@14:10881)
    at obj_0_g$.click(showcase-0.js@22:93250)
    at isc_StatefulCanvas_handleActivate(http://127.0.0.1:8888/showcase/sc/modules/ISC_Foundation.js?isc_version=11.0p_2016-05-03.js@108:211)
    at isc_StatefulCanvas_handleClick(http://127.0.0.1:8888/showcase/sc/modules/ISC_Foundation.js?isc_version=11.0p_2016-05-03.js@13:212)
    at isc_c_EventHandler_bubbleEvent(http://127.0.0.1:8888/showcase/sc/modules/ISC_Core.js?isc_version=11.0p_2016-05-03.js@89:1703)
    at isc_c_EventHandler_handleClick(http://127.0.0.1:8888/showcase/sc/modules/ISC_Core.js?isc_version=11.0p_2016-05-03.js@50:1561)
    at isc_c_EventHandler__handleMouseUp(http://127.0.0.1:8888/showcase/sc/modules/ISC_Core.js?isc_version=11.0p_2016-05-03.js@11:1546)
    at isc_c_EventHandler_handleMouseUp(http://127.0.0.1:8888/showcase/sc/modules/ISC_Core.js?isc_version=11.0p_2016-05-03.js@57:1537)
    at isc_c_EventHandler_dispatch(http://127.0.0.1:8888/showcase/sc/modules/ISC_Core.js?isc_version=11.0p_2016-05-03.js@108:1781)
    at eval(eval at isc__makeFunction (http://127.0.0.1:8888/showcase/sc/modules/ISC_Core.js?isc_version=11.0p_2016-05-03.js@122:57)

here is the example change LiveGridFetchSample.java of the "showcase" that produces this error
when I click on "Order New Item"

Linux : Fedora 23
Chrome: 50.0.2661.94 (64-bit)
Gwt : 2.7.0

As always any help is greatly appreciated.

Thanks.

LiveGridFetchSample.java

[Isomorphic]

This should be resolved in SGWT 5.1p/SC 10.1p and newer, and in the nightly builds dated 2016-05-05 and beyond.