Hi Johann,

I appreciate the provided information. 

To test your case, I have set the monitor scale option to 150%. After running my test project and clicking on the filter icon, the filter pop-up appears in the wrong location. This is quite strange. It is easily reproducible with the latest version of our controls. I have escalated this to our development team for further investigation with a higher priority. As soon as I have more information regarding this, I will post it here. Please accept my apologies for any inconvenience this may have caused you. 

In the meantime, I see that you have found a temporary solution to fix the location of the filter pop-up. I hope you can use it until this is resolved. 

Regards,
Dinko | Tech Support Engineer
Progress Telerik

Hi Johann,

The feedback item is already completed. The fix was included in the 2025.4.1111 (2025 Q4) version of our controls. This is mentioned in the upper left corner of the feedback item. The fix is also included in the latest versions. May I ask you to double-check the Telerik UI for WinForms assemblies version that are referenced in your project? If they are older, you can update them to their latest version. 

Then you can check if the reported behavior is still observed. If so, feel free to share more details about your project, and I will help you identify what is causing it.

Regards,
Dinko | Tech Support Engineer
Progress Telerik

Hi Jackson,

Thank you for reporting this behavior. Here is a possible workaround that can be used until this item is resolved:

public RadForm1()
{
    InitializeComponent();
    this.radGridView1.FilterPopupInitialized += RadGridView1_FilterPopupInitialized;
}

private void RadGridView1_FilterPopupInitialized(object sender, FilterPopupInitializedEventArgs e)
{
    RadListFilterPopup popup = e.FilterPopup as RadListFilterPopup;
    popup.MinimumSize = new Size(300, 300);
    popup.PopupOpened += Popup_PopupOpened;
}

private void Popup_PopupOpened(object sender, EventArgs args)
{
    RadListFilterPopup popup = sender as RadListFilterPopup;
    popup.LocationChanged += Popup_LocationChanged;
    popup.Location = new System.Drawing.Point(MousePosition.X, MousePosition.Y);
}
private void Popup_LocationChanged(object sender, EventArgs e)
{
    RadListFilterPopup popup = sender as RadListFilterPopup;
    if (popup != null)
    {
        popup.LocationChanged -= Popup_LocationChanged;
        Screen screen = Screen.FromPoint(new System.Drawing.Point(popup.Left, popup.Top));
        if (popup.Left + popup.Width > screen.WorkingArea.Right)
        {
            popup.Left = screen.WorkingArea.Right - popup.Width;
        }
    }
}

Regards,
Dinko | Tech Support Engineer
Progress Telerik