Hi, I thought I should tell you that I actually stopped using your site after this feature was added, because previously I could tap the bottom of the screen to get the bottom bar up, but now I can't. You might lose other users because of this, I guess.
I can't believe they didn't tested orientation change with minimal-ui.
Also, in landscape mode, you loose top ~30px area. If you tap there, it will show safari chrome, and your app won't receive tap.