Symptoms

I created a view and added AutoComplete contol in it. Configured the DataSource property to a AD SmartObject and ran the View. The view did not load at all. It just kept spinning after launch. Then I removed the SO from the data source and added some static list of values as data source in the control itself. The view got loaded after launch. But the Autocomplete is not working. I typed some characters but the dropdown is not appearing.

I tried this IE as well as Chrome and both are showing the same issue.

 

Diagnoses

The autocomplete control has some properties which sets a minimum length on a word to start searching for it. I tested the solution on my side and added a new complete control to the form which worked as expected.
 

Resolution

Looking at the properties, the Minimum Length on the user's control was set to 200. This was waiting for 200 characters to be input to start looking for records matching those 200 characters. Setting the Minimum length back to 1 resolved the issue.