Multiple <telerik:RadListBox> are being rendered too slow due to huge amount of rows

Question

I have an ascx-control is being placed 7 times at the aspx-page. All controls render the same huge amount of rows: 2400.

The 1st control takes ~1 sec to render. The 2nd - ~3 sec. The 3rd - ~15 sec. The 4th - ~25 sec. The 5th - ~40 sec. The 6th - ~65 sec. The 7th - ~105 sec. To render all controls on client it takes about 6 min, regardless the first 2 controls is being rendered almost immediately.

This is reproduced only on the Google Chrome the latest version (83.0.4103.97). I did a try on the Chrome v.81, and there is no performance issue. Also, there is no performance issue on the following browsers: Mozilla Firefox, IE 11, Edge.

Please see below usage of the RadListBox:

<telerik:RadListBox ID="RadListBox1" 
                    OnItemDataBound="RadListBox1_ItemDataBound" 
                    CheckBoxes="true" 
                    OnClientItemChecked="ItemChecked" 
                    Width="100%" Height="200px" 
                    SelectionMode="Single" 
                    DataTextField="Name" 
                    DataValueField="ID" 
                    EmptyMessage="No Rows" 
                    OnClientLoad="SetInitialEnable"
                    runat="server"></telerik:RadListBox> 

And set items at the ascx.cs:

        DataTable list = GetList();
        RadListBox1.DataSource = list;
        RadListBox1.DataBind();

Actually I have tried the Load On Demand feature, the controls have been loaded even immediately, but all custom js were failed.

Please advice.