Hi Nagarjuna,
Thanks for Contacting Syncfusion support.
We tried to reproduce the mentioned scenario but unfortunately we were unable to reproduce it. We have used the Button click event to take the values of the autocomplete text boxes and on the Button Click, values are not turning to empty even on the two-way binding.
Please find the below sample for your reference.
Also, we would like to know whether the values become empty on any postback or saved after any Database or something related to that. And please Open the console window and check for scripts errors. If you found any errors, please share us the screenshot and if possible use our shared sample to reproduce your issue.
Please explain us more detailly so that it would be helpful for us to assist you further.
Regards,
Arun P.