BUG 3.4 EditWidget (Editor/AttributeInspector) Undo

I found this bug trying to set up my own edit widget. Decided to double check in the default viewer to make sure I wasn't doing something wrong. Got the same result. Apologies in advance, this should probably be in the api forum.

1. Open Edit Widget
2. Check "San Francisco 3-1-1 Incidents"
3. Click feature on map to open inspector
4. Edit any attribute
5. Click Ok
6. Click Undo and receive the following error:

TypeError: Error #1009: Cannot access a property or method of a null object reference.
at com.esri.ags.components::AttributeInspector/validate()[C:\checkout\flex_api3\api\src\com\esri\ags\components\AttributeInspector.as:1223]
at com.esri.ags.components::AttributeInspector/set activeFeatureIndex$()[C:\checkout\flex_api3\api\src\com\esri\ags\components\AttributeInspector.as:576]
at com.esri.ags.components::AttributeInspector/set activeFeatureIndex()[C:\checkout\flex_api3\api\src\com\esri\ags\components\AttributeInspector.as:567]
at com.esri.ags.components::AttributeInspector/refresh()[C:\checkout\flex_api3\api\src\com\esri\ags\components\AttributeInspector.as:1310]
at com.esri.ags.components.supportClasses::EditAttributesOperation/undoattributeInspector_editsCompleteHandler()[C:\checkout\flex_api3\api\src\com\esri\ags\components\supportClasses\EditAttributesOperation.as:136]
at mx.rpc::AsyncResponder/result()
at com.esri.ags.tasks::FeatureLayerTask/handleApplyEdits()[C:\checkout\flex_api3\api\src\com\esri\ags\tasks\FeatureLayerTask.as:311]
at Function/http://adobe.com/AS3/2006/builtin::call()
at com.esri.ags.tasks::BaseTask/handleResultEvent()[C:\checkout\flex_api3\api\src\com\esri\ags\tasks\BaseTask.as:736]
at mx.rpc::AsyncResponder/result()
at mx.rpc::AsyncToken/http://www.adobe.com/2006/flex/mx/internal::applyResult()
at mx.rpc.events::ResultEvent/http://www.adobe.com/2006/flex/mx/internal::callTokenResponders()
at HTTPOperation/http://www.adobe.com/2006/flex/mx/internal::dispatchRpcEvent()
at mx.rpc::AbstractInvoker/http://www.adobe.com/2006/flex/mx/internal::resultHandler()
at mx.rpc::Responder/result()
at mx.rpc::AsyncRequest/acknowledge()
at DirectHTTPMessageResponder/completeHandler()
at flash.events::EventDispatcher/dispatchEventFunction()
at flash.events::EventDispatcher/dispatchEvent()
at flash.net::URLLoader/onComplete()