Sorry, forgot to include this in the original post:
The version is: 15.46000.0.17
This issue happens with Chome, FireFox, IE
<ej-grid id="grdHaaS" allow-filtering="true" min-width="500" allow-text-wrap="true" show-column-chooser="true" allow-sorting="true"
allow-scrolling="true" is-responsive="true" show-summary="true" show-stacked-header="true" allow-searching="true" toolbar-click="ToolBarClick"
query="new ej.Query().where('Bu', 'equal', 'CPBU', true)">
<e-datamanager url="/Haas/GetOpex" adaptor="UrlAdaptor" />
<e-edit-settings allow-adding="false" allow-editing="false" edit-mode="Normal" />
<e-toolbar-settings show-toolbar="true" toolbar-items='@new List<string>{"search"}'
custom-toolbar-items='@new List<object>() { new Syncfusion.JavaScript.Models.CustomToolbarItem() { TemplateID = "#Filter" },
new Syncfusion.JavaScript.Models.CustomToolbarItem() { TemplateID = "#AutoSize" },
new Syncfusion.JavaScript.Models.CustomToolbarItem() { TemplateID = "#RefreshData" }}'/>
<e-filter-settings filter-type="Excel" />
<e-scroll-settings width=@("100%") height=@("100%") enable-touch-scroll="false" />
<e-summary-rows>
<e-summary-row title="Totals">
<e-summary-columns>
<e-summary-column summary-type="Sum" format="{0:C0}" display-column="EstimateOpex" datamember="EstimateOpex" />
<e-summary-column summary-type="Sum" format="{0:C0}" display-column="ActualOpex" datamember="ActualOpex" />
<e-summary-column summary-type="Sum" format="{0:C0}" display-column="M1Q1" datamember="M1Q1" />
.....
</e-summary-columns>
</e-summary-row>
</e-summary-rows>
<e-stacked-header-rows>
<e-stacked-header-row>
<e-stacked-header-columns>
<e-stacked-header-column header-text="Q1" css-class="blue2BG" text-align="Center" column='@new List<string> {"M1Q1","M2Q1","M3Q1","Q1Total" }' />
<e-stacked-header-column header-text="Q2" css-class="blue2BG" text-align="Center" column='@new List<string> {"M1Q2","M2Q2","M3Q2","Q2Total" }' />
<e-stacked-header-column header-text="Q3" css-class="blue2BG" text-align="Center" column='@new List<string> {"M1Q3","M2Q3","M3Q3","Q3Total" }' />
<e-stacked-header-column header-text="Q4" css-class="blue2BG" text-align="Center" column='@new List<string> {"M1Q4","M2Q4","M3Q4","Q4Total" }' />
</e-stacked-header-columns>
</e-stacked-header-row>
</e-stacked-header-rows>
<e-columns>
<e-column field="HaaStrackingId" header-text="ID" allow-editing="false" is-primary-key="true" width="75" />
<e-column field="Period" header-text="Period" width="110" />
<e-column field="DateRequested" header-text="Requested" format="{0:MM/dd/yyyy}" width="120" />
<e-column field="DateDelivered" header-text="Delivered" format="{0:MM/dd/yyyy}" width="120" />
<e-column field="Bu" header-text="BU" edit-type="DropdownEdit" datasource="@ViewBag.BUs" width="100" />
<e-column field="ProjectName" header-text="Project Name" width="120" />
<e-column field="Description" header-text="Description" width="250" />
<e-column field="Type" header-text="Type" width="120" />
<e-column field="Tier" header-text="Tier" width="100" />
<e-column field="QtyServers" header-text="Qty" width="90" />
<e-column field="M1Q1" header-text="M1Q1" format="{0:C0}" text-align="Right" width="100" />
<e-column field="M2Q1" header-text="M2Q1" format="{0:C0}" text-align="Right" width="100" />
<e-column field="M3Q1" header-text="M3Q1" format="{0:C0}" text-align="Right" width="100" />
<e-column field="Q1Total" header-text="Q1 Total" format="{0:C0}" text-align="Right" width="100" css-class="blue2BG" />
<e-column field="M1Q2" header-text="M1Q2" format="{0:C0}" text-align="Right" width="100" />
<e-column field="M2Q2" header-text="M2Q2" format="{0:C0}" text-align="Right" width="100" />
<e-column field="M3Q2" header-text="M3Q2" format="{0:C0}" text-align="Right" width="100" />
<e-column field="Q2Total" header-text="Q2 Total" format="{0:C0}" text-align="Right" width="100" css-class="contacts" />
<e-column field="M1Q3" header-text="M1Q3" format="{0:C0}" text-align="Right" width="100" />
<e-column field="M2Q3" header-text="M2Q3" format="{0:C0}" text-align="Right" width="100" />
<e-column field="M3Q3" header-text="M3Q3" format="{0:C0}" text-align="Right" width="100" />
<e-column field="Q3Total" header-text="Q3 Total" format="{0:C0}" text-align="Right" width="100" css-class="blue3BG" />
<e-column field="M1Q4" header-text="M1Q4" format="{0:C0}" text-align="Right" width="100" />
<e-column field="M2Q4" header-text="M2Q4" format="{0:C0}" text-align="Right" width="100" />
<e-column field="M3Q4" header-text="M3Q4" format="{0:C0}" text-align="Right" width="100" />
<e-column field="Q4Total" header-text="Q4 Total" format="{0:C0}" text-align="Right" width="100" css-class="blue4BG" />
<e-column field="FYTotal" header-text="FY4 Total" format="{0:C0}" text-align="Right" width="120" css-class="qtrCSS" />
</e-columns>
</ej-grid>