ISSUE: Screenshot of this issue can be seen at https://goo.gl/F8C73V.
This issue occurs in classic render mode when an option has long text that gets truncated instead of being wrapped.
HOW TO REPRODUCE:
Use the following page code to reproduce it. Expand the drop down and notice that the option just after None is truncated and not wrapped.
<%@ Page Language="C#" AutoEventWireup="true"%>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
</head>
<body>
<form id="form1" runat="server">
<telerik:RadScriptManager ID="RadScriptManager1" runat="server">
<Scripts>
<asp:ScriptReference Assembly="Telerik.Web.UI" Name="Telerik.Web.UI.Common.Core.js"></asp:ScriptReference>
<asp:ScriptReference Assembly="Telerik.Web.UI" Name="Telerik.Web.UI.Common.jQuery.js"></asp:ScriptReference>
<asp:ScriptReference Assembly="Telerik.Web.UI" Name="Telerik.Web.UI.Common.jQueryInclude.js"></asp:ScriptReference>
</Scripts>
</telerik:RadScriptManager>
<telerik:RadSkinManager ID="RadSkinManager1" runat="server" ShowChooser="true" RenderMode="Classic" Skin="MetroTouch">
<TargetControls>
<telerik:TargetControl ControlID="RadFormDecorator1" />
</TargetControls>
</telerik:RadSkinManager>
<telerik:RadFormDecorator ID="RadFormDecorator1" runat="server" DecoratedControls="All" RenderMode="Classic" ControlsToSkip="None" />
<select id="dd1" style="width: 200px;">
<option value="none">None</option>
<option value="volvo">Volvo sdsd sdsd ddsds sddsd dsdsd sdds sdsd sdsdsd sdsd sds ddsd xyz</option>
<option value="saab">Saab</option>
<option value="mercedes">Mercedes</option>
<option value="audi">Audi</option>
</select>
<button id="btn1">Postback</button>
</form>
</body>
</html>
RESOLUTION:
Put the following style in head part of your aspx page. This will fix this issue.
<style>
div.rfdSelectBox ul li {
height: unset;
height: none;/*for ie and edge*/
height: auto;
}
</style>