I don't know if this is a bug or just something that needs to be implemented, so I'm submitting as a suggestion for now. When you close Orion on iOS and let the OS put the app to sleep, when you re-launch later, all the tabs you had open display the URL instead of the page name. Safari and other browsers on iOS display the page name rather than the URL after recovering the app from sleep, so the suggestion is for Orion to do the same.
Screenshot showing tab list displaying URLs instead of page names:
