We've been reported a similar issue with inaccurate measurement of ListView items on Android, you could find the bug report on our public portal below:
If that's not the case you have, can you try to isolate the issue in a sample project and send it to us? We will need to reproduce the issue at our side in order to test it and investigate it further.
As to the question about forcing cell layout update -
If the ItemsSource of the RadListView is bound in TwoWay mode and the underlying collection is ObservableCollection, the ListView component should be automatically updated whenever the collection changes. So, basically, you could use this approach to recalculate the layout.
I am looking forward to your reply.
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