Hi Eric,
I tried to reproduce the issue but with no success. Could you please provide some more information about your scenario. How much items do you have, do you use Virtualizing Stackpanel or any custom styles/templates?
If it is possible you can send a simple application where the issue can be reproduced. It will be of great help in pinpointing the problem.
Greetings,
Boyan
the Telerik team
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