Replicate by dragging a RadListBox item vertically in the Drag-and-drop demo, on a mobile device.
A workaround is to disable the embedded jQuery and use an older version (for example, 1.11.1 which is the previous version the suite used): https://docs.telerik.com/devtools/aspnet-ajax/controls/scriptmanager/disabling-the-embedded-jquery Repro steps: 1. put a listbox on the page 2. configure it so it does postbacks (e.g., on selection changed, or any other feature) 3. ivnoke said postback (e.g., select an item) Expected: the action is carried off Actual: Firefox throws TypeError: access to strict mode caller function is censored Sample markup <telerik:RadListBox runat="server" ID="rlb1" OnSelectedIndexChanged="rlb1_SelectedIndexChanged" AutoPostBack="true"> <Items> <telerik:RadListBoxItem Text="first" Selected="true" /> <telerik:RadListBoxItem Text="second" /> </Items> </telerik:RadListBox>
When using: Value = "(null)" Text = "(no user)" as item in the ListBox, the filter must work correctly, and after opening the menu the item should be checked if previously filtered. Additionally if the item have NULL value instead of "(null)" The visible value must be localized.
The error is observed when an item that is added from the client-side is to be transferred to other RadListBox from a RadListBox that is loading on demand. Unfortunately the control supports such scenario only when that transfer is made from the server side.