ListBox with asp:button in android 4.1

[Simon]

Hi!
I couldn't find the solution on my problem here in the Forum so i created a new Thread, but if there already is a Thread about this topic then send me there. 

The Problem occurring when I am using a asp:Button under my ListBox. The button is not firing in the default browser in Android 4.1 but it is working with older Android and other Chrome in Android. 

Here is the aspx code. 

<div class="LeftWrapper" id="decorationZone">
     <telerik:RadListBox ID="List" runat="server" AppendDataBoundItems="True"
         CheckBoxes="true" Skin="MetroTouch" OnClientItemChecked="OnClientItemCheckedHandler"
         OnClientSelectedIndexChanged="OnClientSelectedIndexChanged">
         <ButtonSettings TransferButtons="All"></ButtonSettings>
     </telerik:RadListBox>
     <p style="z-index:40 !important;" >
         <asp:Button ID="AddButton" runat="server" Text="" OnClientClick="alert('working');addLoading('AddButton','LaggTillButton');"
             CssClass="LaggTillButton" />
     </p>
 </div>

Here is the css for the listbox

#List
{
    height: 400px;
    width: 200px;
    overflow: auto;
    border: solid 1px #8b9ba7 !important;
    margin-left: 10px;
    margin-bottom: 3px;
    display: block;
    float: right;
    display: inline;
    white-space: nowrap;
    position:static !important;

}

Thank you