Trying to submit a new ticket without a title will result in a form submission error notice,
which also clears the form fields other than the textarea.
The fields page/url, project and labels should stay as they were submitted/entered.
We already have a ticket for this here: [allura:tickets:#4740]
Chris Tsai, SourceForge.net Support
Apache Allura: Tickets: #4740
Custom fields are now retained if a ticket is submitted without a title.