Have you tried to restore default widget forms? If you haven't, please try and let me know whether the issue persist.
In the last case, I would ask you to raise a ticket - write a message to [email protected]. Please specify in it HelpDesk instance's URL, a ticket ID on which the issue occurred. It would be more convenient to have access to the instance and to the page with the widget. If it's not possible, please specify widget's configuration ID (you can find it in settings of HelpDesk instance). Also, reproduce the issue (submit a ticket) and share contents of browser console (F12 => Console) and an HAR file (export it on F12 => Network tab).