This is only an issue for long catalog feed titles. One solution would be to force the back button to have no title or to always say "Back" when on the search view controller. More thought is required.

steps to reproduce: 

• Select a lane with a long name (like 'Young Adult Nonfiction')
• the lane name selected shows up in the header
• tap the 'search' icon
• lane name persists and blocks entire search field