When the ComboBoxAdv contains multiple items with the same text, it will not fire the SelectedIndexChanged.
For example, the ComboBox has these item:
If the currently selected item''s text is different from the previously selected item''s text -> it fires the event. But if they are the same, then it won''t fire. From W-222 to W-333, the event is fired. But from W-222 to another W-222, the event won''t get fired.
I also created a sample here to demonstrate the prob.
Syncfusion version: 126.96.36.199
.NET Framework version: 1.1.4322