Quite frustrating to lose all the user has written after doing a check 'did I just file a duplicate' (no you did not..), or adding additional details, refrencing other tickets.
One way to do this would be to also submit the ticket title and description with the search, include the title and description with search results. I have seen browsers retain the text content themselves as well. Don't know too much about it.
Light JS is also an option.. ..probably rather not.