Hi Kevin ,
This problem is a not a small challenge as the lookup logic happens in the UI layer ( by the combobox itself ) .At the other side -the data layer is responsible for operations such as sorting grouping and and filtering. We are putting strong efforts in order to solve that discrepancy. However some major refactoring is required and still we are aiming to not introduce breaking changes in the API .
Having this it is a bit hard for me to state a certain date when this wil be provided.
We are doing our best to solve the issue. If you take the latest internal build , you may notice there are some improvements already - the distinct values in the filter are now translated to Display Member .
the Telerik team
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