Hi Enrico,

It seems that the problem is fixed with the debouncing feature for textboxes. There is a default delay that sometimes can interrupt if the input is submitted faster. This feature comes with our 2.30.0 version.

The thing I can suggest here is to set the TextBox DebounceDelay parameter to "0". I have modified the provided example:

<div class="box-content" style="margin: auto;">
    <h4>Enabled TextBox</h4>

    <TelerikTextBox DebounceDelay="0" PlaceHolder="Type your message here" 
                    OnChange="@((object input)=> Console.WriteLine(input))">
    </TelerikTextBox>

    <h4>Disabled TextBox</h4>

    <TelerikTextBox Enabled="false" Value="Disabled"></TelerikTextBox>
</div>

Please run and test it to see the result.

I'm marking the current item as "Completed" as the problem is fixed with the debounce parameter. If there is still a problem, please let me know.

Regards,
Hristian Stefanov
Progress Telerik