Hello,

Please use the following example to reproduce the issue.

<UserControl x:Class="Infragistics.RibbonIssue.MainPage"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
             xmlns:ig="http://schemas.infragistics.com/xaml"
             xmlns:igPrim="http://schemas.infragistics.com/xaml/primitives" mc:Ignorable="d"
    d:DesignHeight="300" d:DesignWidth="800">

    <Grid x:Name="LayoutRoot" Background="White">
        <ig:XamRibbon>
            <ig:XamRibbon.Tabs>
                <ig:XamRibbonTabItem Header="Sample Tab">
                    <ig:XamRibbonGroup Caption="Share">
                        <ig:XamRibbonGroup.Style>
                            <Style TargetType="igPrim:RibbonGroupControl">
                                <Setter Property="Visibility" Value="Visible"/>
                            </Style>
                        </ig:XamRibbonGroup.Style>

                        <ig:ButtonTool Caption="Print"/>
                        <ig:ButtonTool Caption="Print"/>
                        <ig:ButtonTool Caption="Print"/>
                        <ig:ButtonTool Caption="Print"/>
                        <ig:ButtonTool Caption="Print"/>
                        <ig:ButtonTool Caption="Print"/>
                        <ig:ButtonTool Caption="Print"/>
                        <ig:ButtonTool Caption="Print"/>
                        <ig:ButtonTool Caption="Print"/>
                        <ig:ButtonTool Caption="Print"/>
                        <ig:ButtonTool Caption="Print"/>
                        <ig:ButtonTool Caption="Print"/>
              <ig:ButtonTool Caption="Print"/>
                        <ig:ButtonTool Caption="Print"/>
                        <ig:ButtonTool Caption="Print"/>
                        <ig:ButtonTool Caption="Print"/>
                        <ig:ButtonTool Caption="Print"/>
                        <ig:ButtonTool Caption="Print"/>
                        <ig:ButtonTool Caption="Print"/>
                        <ig:ButtonTool Caption="Print"/>
                        <ig:ButtonTool Caption="Print"/>
                        <ig:ButtonTool Caption="Print"/>
                        <ig:ButtonTool Caption="Print"/>
                        <ig:ButtonTool Caption="Print"/>
                        <ig:ButtonTool Caption="Print"/>
                        <ig:ButtonTool Caption="Print"/>                     
                        <ig:ButtonTool Caption="Print"/>
                        <ig:ButtonTool Caption="Print"/>
                        <ig:ButtonTool Caption="Print"/>
                        <ig:ButtonTool Caption="Print"/>
                        <ig:ButtonTool Caption="Print"/>
                    </ig:XamRibbonGroup>

                    <ig:XamRibbonGroup Caption="Contacts">
                        <ig:XamRibbonGroup.Style>
                            <Style TargetType="igPrim:RibbonGroupControl">
                                <Setter Property="Visibility" Value="Collapsed"/>
                            </Style>
                        </ig:XamRibbonGroup.Style>

                        <ig:ButtonTool Caption="Print"/>
                    </ig:XamRibbonGroup>

                </ig:XamRibbonTabItem>
            </ig:XamRibbon.Tabs>
        </ig:XamRibbon>
    </Grid>
</UserControl>

Would you please help me to work around this issue?

Thank you