Nested repeater control in ASP.NET

I have a nested repeater control with multiple views. Here the parent repeater is bound to a datatable. When we click on the div in parent repeater, child repeaters will be displayed in a dropdown box. But I'm getting same instance of child repeaters in all views of parent repeater. Please help me to resolve the issue. 

<asp:Repeater ID="Repeater1" runat="server" OnItemDataBound="Repeater1_ItemDataBound">
                            <ItemTemplate>
                                <div class="row row-border pb-1 pt-1 border-bottom border-dark dropdown-toggle" data-toggle="dropdown">
                                    <div class="col-md-2">
                                        <asp:Label ID="LabelDate" runat="server" Text='<%# Eval("id") %>'></asp:Label>
                                    </div>
                                    <div class="col-md-2">
                                        <asp:Label ID="Label1" runat="server" Text="Test 1"></asp:Label>
                                    </div>
                                    <div class="col-md-2">
                                        <asp:Label ID="Label2" runat="server" Text="Test 2"></asp:Label>
                                    </div>
                                    <div class="col-md-2">
                                        <asp:Label ID="Label3" runat="server" Text="Test 3"></asp:Label>
                                    </div>
                                    <div class="col-md-2">
                                        <asp:Label ID="Label4" runat="server" Text="Test 4"></asp:Label>
                                    </div>
                                </div>
                                <div class="dropdown-menu dropdown-menu-right">
                                    <div class="row">
                                        <div class="col-md-12">
                                            Header 
                                        </div>
                                        <div class="col-md-6">
                                            <asp:Repeater ID="Repeater2" runat="server">
                                                <ItemTemplate>
                                                    <div class="row">
                                                     <div class="col-md-12">
                                                         <%# Container.DataItem?.ToString() ?? string.Empty%>
                                                     </div>
                                                </div>
                                                </ItemTemplate>
                                            </asp:Repeater>
                                        </div>
                                        <div class="col-md-6">
                                            <asp:Repeater ID="Repeater3" runat="server">
                                                <ItemTemplate>
                                                    <div class="row">
                                                     <div class="col-md-12">
                                                         <%# Container.DataItem?.ToString() ?? string.Empty%>
                                                     </div>
                                                </div>
                                                </ItemTemplate>
                                            </asp:Repeater>
                                        </div>
                                    </div>
                                </div>
                            </ItemTemplate>
                        </asp:Repeater>

Repeater1_ItemDataBound(object sender, RepeaterItemEventArgs e)
       {
           ...
           var Temp1= new List<string>();
           var Temp2= new List<string>();
           ...

           Repeater Rptr2 = (e.Item.FindControl("Repeater2") as Repeater);
           Repeater Rptr3 = (e.Item.FindControl("Repeater3") as Repeater);
           Rptr2.DataSource = Temp1;
           Rptr3.DataSource = Temp2;
           Rptr2.DataBind();
           Rptr3.DataBind();
       }