RadRotator stops working after Ctrl+F5 refresh if the ItemWidth is not set in Firefox. After the refresh RadRotator looses its item width calculation and show only the first item, the others and rendered on the next row.

Video: https://www.screencast.com/t/hqYDQrPsemK

1. Run the code below in Firefox
2. Press Ctrl + F5

Result: The rotator does not rotate the items anymore

                    <telerik:RadRotator ID="RadRotatorLogosTelerik" RotatorType="AutomaticAdvance" Skin="Metro" RenderMode="Lightweight" Visible="true" runat="server" EnableRandomOrder="false"
                        Height="180px" Width="980px"
                        ItemHeight="80px">
                        <Items>
                            <telerik:RadRotatorItem>
                                <ItemTemplate>
                                    <div id="imgitemTemplate">
                                        <asp:Image ID="Image1" runat="server" AlternateText="becken" ImageUrl="https://placeimg.com/980/80/tech" />
                                    </div>
                                </ItemTemplate>
                            </telerik:RadRotatorItem>
                            <telerik:RadRotatorItem>
                                <ItemTemplate>
                                    <div id="imgitemTemplate">
                                        <asp:Image ID="Image2" runat="server" AlternateText="goodis" ImageUrl="https://placeimg.com/980/80/animals" />
                                    </div>
                                </ItemTemplate>
                            </telerik:RadRotatorItem>
                            <telerik:RadRotatorItem>
                                <ItemTemplate>
                                    <div id="imgitemTemplate">
                                        <asp:Image ID="Image3" runat="server" AlternateText="kubo" ImageUrl="https://placeimg.com/980/80/arch" />
                                    </div>
                                </ItemTemplate>
                            </telerik:RadRotatorItem>
                        </Items>
                    </telerik:RadRotator>