I think this is it. There are a bunch of tiny details in the iOS soft keyboard that make typing more accurate and I bet a lot of the behavior is hard-coded. For

I think this is it. There are a bunch of tiny details in the iOS soft keyboard that make typing more accurate and I bet a lot of the behavior is hard-coded. For example, if you use the split keyboard layout on the iPad and you try to hit the Y key with your left thumb even though it’s on the right side keyboard, the software will fudge it to make it work anyway. If you shift your thumbs while you’re typing and suddenly you’ve crossed the border onto another key, it seems like it shifts the hit boxes slightly to compensate (I’m not sure how to reproduce this one 100% of the time though).