Inline edit - do not preserve field values

Hi guys,
Admin-> Inline Edit in Grid ->
Is there any way to preserve the values of all the entered fields, if there's validation failure in inline edit?

Currently, if any field fails to validate, it removes values from all the entered fields from the grid :(

sample code:
//validate model
if (!ModelState.IsValid)
{
     return ErrorJson(ModelState.SerializeErrors());
}