Hello JUAN CRESPO,
1. Can you try calling the DomainDataSource.Load method after the changes are submitted. This should pull data back to the client.
2. You can try setting Height to "*". Alternatively, you can try placing the grid in a container with a fixed height, i.e. so that 10 records are always visible, and the set the VerticalAlignment of the grid to Stretch.
I hope this helps.
Please, let us know if there are problems.
the Telerik team
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