Hello René,

Apologies for the missing link, here it is: https://github.com/telerik/blazor-ui/tree/master/common/popup-causes-scroll.

And thank you for the sample, I was able to reproduce this. It is, indeed, extremely random, it may not happen for over 30 "bashing" attempts (very quick clicks), then it might happen 2 times in 5 clicks. At this point, I do not know what is causing this, as it behaves the same for me inside the window, or outside of it, so I don't think the Window is related.

That said, I have logged this for further research and you will find your Telerik points updated as a small "thank you" for finding this.

Regards,
Marin Bratanov
Progress Telerik

Hello René , 

When you select the "make public" checkbox at the end of the ticket submission process this directly results in a public page in the Feedback portal, and not in a ticket that has the response time from your license. We do try to monitor those new pages there, but we can't always get to them as fast as we can get to "regular" tickets. So, for time-sensitive issues (or cases when you have to share some private data such as proprietary code or screenshots with data) I recommend keeping the ticket private - it will then show up in your account and will have the response time from your license.

As for the issue you are facing - I am not aware of reasons for such behavior and my best guess is that either of these is happening:

• there is a slow operation in the handler that causes something to go out of sync
• something goes wrong with the focus, perhaps something is off with the scrollable container (see more details on this type of issue here)

If you can reproduce this issue with a sample similar to the one below, that would be quite helpful because in my tests I was not able to see an issue (I must have clicked around the slider dozens of times):

@TheValue

<TelerikWindow Visible="true" Width="600px" Height="300px">
    <WindowContent>

            <TelerikSlider Value="@TheValue" ValueChanged="@( (int v) => ValueChangedHandler(v))"
                           SmallStep="10" LargeStep="20" Min="0" Max="100" Width="500px">
            </TelerikSlider>
        
    </WindowContent>
    <WindowTitle>The window</WindowTitle>
</TelerikWindow>
@code{
    int TheValue { get; set; } = 30;

    async Task ValueChangedHandler(int v)
    {
        // update the view-model to let the change render
        // if you avoid that, you wil effectively cancel the event
        TheValue = v;

        Console.WriteLine($"The user has now chosen {v}");
    }
}

Regards,
Marin Bratanov
Progress Telerik