Sure. The issue reported:
https://www.noesisengine.com/bugs/view.php?id=1777

By the way, I suppose the converting workflow is even better for my purpose of using the dynamic geometry generation. Thank you for advice. Really helpful!

Here the xaml sample: <Canvas VerticalAlignment="Center" HorizontalAlignment="Center"> <Path Stroke="Black" StrokeThickness="2" Fill="Blue"> <Path.Data> <GeometryGroup> <EllipseGeometry Center="110 60" RadiusX="50" RadiusY="5...

Never mind. My fault. Source collection of items was recreated every frame not every click as I planned. I fixed it. So, now everything is working without any issues.

EDIT: Everything is working properly. It was my fault. ================================================ ToolTip works well for static UI elements but nothing happens when I'm trying to use ToolTip for items of any List control (ItemsControl, ListView, ListBox, etc). <Grid> <StackPanel Orientation=&...