Filtering breaks when grid is inserted into Menu

[Jark Monster]

I have a menu that I have inserted a grid into.  I use selections in the grid to populate another grid outside of the menu.  All of this is working correctly.

However, I was hit with an extra request of making the items listed in the menu-grid filterable.  I added the tag, but unfortunately, the filter icon does not appear...

I have tried to remove this grid and place it within another area (direct copy/paste, no code change) in the document and the filtering functions correctly.

See attached pictures for extra clarification

I will also note that Sorting works correctly when the grid is inside the menu which makes me think this is in fact a bug and not intentional, but I'm not sure.

For grids within a menu, is the 'filterable()' attribute intentionally neglected?  If so, why and regardless of intentionality, will this change/be fixed in a future release?

Menu Code:

@(Html.Kendo().Menu()

    .Name("ProductBookMenu")

    .OpenOnClick(true)

    .CloseOnClick(true)

    .Items(items =>

    {

        items.Add()

            .Text("Product Book")

            .Content(Html.Partial("ProductBook", Model.ItemModelList).ToHtmlString());

    })

)

Grid Code (ProductBook.cshtml):

@model List<Company.Product.MVC.Models.ItemModel>

@using Kendo.Mvc.UI

 

<script>

function PopulateItemGrid() {

    var productBookGrid = $("#ProductBookGrid").data("kendoGrid");

    var itemGrid = $("#QuoteItemGrid").data("kendoGrid");

 

    productBookGrid.select().each(function () {

        var dataItem = productBookGrid.dataItem($(this));

        itemGrid.dataSource.add(dataItem);

    });

 

    $("#ProductBookMenu").data("kendoMenu").close("#Item1");

}

</script>

 

@(Html.Kendo().Grid(Model)

    .Name("ProductBookGrid")

    .Columns(columns =>

    {

        columns.Bound(i => i.FreightClass).Width(70);

        columns.Bound(i => i.DimensionLength).Width(70);

        columns.Bound(i => i.DimensionWidth).Width(70);

        columns.Bound(i => i.DimensionHeight).Width(70);

        columns.Bound(i => i.DimensionUnitOfMeasure).Width(70);

        columns.Bound(i => i.QuantityQuantityValue).Width(70);

        columns.Bound(i => i.QuantityUnitOfMeasure).Width(70);

        columns.Bound(i => i.WeightWeightValue).Width(70);

        columns.Bound(i => i.WeightUnitOfMeasure).Width(70);

        columns.Bound(i => i.NmfcCode).Width(75);

        columns.Bound(i => i.ItemDescription).Width(150);

    })

    .ToolBar(toolbar =>

    {

        toolbar.Custom().Text("Add").Url("#_").HtmlAttributes(new { onclick = "PopulateItemGrid()" });

    })

    .Pageable()

    .Sortable()

    .Scrollable()

    .Filterable()

    .Resizable(resize => resize.Columns(true))

    .Reorderable(reorder => reorder.Columns(true))

    .DataSource(dataSource => dataSource

        .Ajax()

    )

    .Selectable(selectable => selectable.Mode(GridSelectionMode.Multiple))

)