SfTabView - Setting TabWidthMode to SizeToContent generates causes gap before the first header

Question

Using this code:

<tabView:SfTabView x:Name="tabView"
                   TabWidthMode="SizeToContent">
    <tabView:SfTabView.Items>
        <tabView:SfTabItem Header="Item" />
        <tabView:SfTabItem Header="Item" />
        <tabView:SfTabItem Header="Item" />
        <tabView:SfTabItem Header="Item" />
    </tabView:SfTabView.Items>
</tabView:SfTabView>

The result looks like this:

I could not figure out, how I can remove the gab (margin and padding do not effect it).

Any help would be appreciated.