Use case: I work on a long response in a flow box and click a link by accident and lose all my text :/ Is there a way the browser can save what you originally wrote? Phabricator does this quite well :)
I am sorry - I have no idea who to assign this to. Thanks!
The main task is T96531: Flow not warning me when I leave an edit page with unsaved changes (currently in code-review) but this is a separate feature-request idea that is worth keeping separate.
(sidenote: as a user, it's best to not try to assign a task to a specific person. Just add the appropriate project #tags if you know them, and let the team sort out who is assigned to it. :)