SPSureshkumar P Syncfusion Team December 16, 2019 05:57 AM
Greetings from Syncfusion support.
We have checked with your query and suspect that the reported issue caused due to incorrect mapping of DropDownList fields or fields API not mapping with DropDownList component when data source is assigned to it. So, we suggest you ensure that fields are mapped correctly with provided data source for DropDownList component. Here, we have prepared the simple sample for your reference and attached it below.