Board Thread:Plants vs. Zombies 2: It's About Time/@comment-9906728-20140619002606/@comment-4009269-20140624235145

That was the way the scrolling was in the original version of PvZ2: the view passed the zombies, then came back, so you could see more to the right. In 1.7, they removed that, so it just stopped at the zombies. Since FF came out when the wide-view was removed already, you never saw it before. They switched it back in the latest version.