The TextBox focused should always be visible, regardless of device. I believe this same bug exists for OnScreenKeyboardHeight. If I had to guess, iOS isn’t accounting for the 36 pixel topbar offset?
We wanted to implement our own version of it using OnScreenKeyboardPosition, OnScreenKeyboardSize and OnScreenKeyboardVisible but they do not work as expected either so we’re left stranded…
We’ve identified a fix and expect it should go out within the next few iOS releases. I’ll follow up here when it’s live(or if anything changes with that).