Hi,
When the ScrollingMode is set to 'Immediate', there is a glitch with the scrollbar when you reach the end of the grid. The scrollbar goes up and down 3-4 times without reason.
To reproduce the problem, use the attached sample. Slowly scroll the vertical scroll bar with the scroll thumb until you reach the end of the data.
Hello,
This looks like an issue. I am going to create a support case on your behalf so that you will be notified when the service release is out.