Can Tasks be filtered by Iteration in LookbackAPI?

Here is a store that returns 0 tasks in iteration, even though there are tasks on user stories in iteration 12345. If I use 'HierarchicalRequirement' instead of 'Task' in '_TypeHierarchy', stories are returned. I also tried adding 'Iteration' to the fetch, but it did not help

var snapshotStore = Ext.create('Rally.data.lookback.SnapshotStore', {
                autoLoad:true,
                fetch    : ['Name','_TypeHierarchy'],
                filters  : [{
                    property : '__At',
                    value    : 'current'
                },
                {
                    property : '_TypeHierarchy',
                    value    : 'Task'
                },
                {
                    property : 'Iteration',
                    value    : 12345
                }
                ],

Thank you.

from Rally LBAPI Documentation

The following fields are not available through the Rally Lookback API.

• Big/rich text fields (Description, Notes, etc.)
• Attachments
• Weblink fields
• LastBuild, LastRun, LastVerdict on TestCases
• Iteration or Release on Tasks
• Attributes for all unsupported entities (Workspace, Iteration, Release, Requirement), e.g. Name, EndDate, StartDate on iterations