On the iPad, in landscape, when you can switch between measures while in edit mode. Meaning, when the measures are scrolling along the bottom.
So … say you open a sheet music, click edit, click into a measure, say measure 12.
Now, while in measure 12 you progress the head so that you’re now editing measure 13.
So … you’re now editing measure 13. Now when you click done, to exit the edit mode, you’ll now be taken to measure 12, not measure 13.
After I clicked done, it was odd that I wasn’t seeing the measure which I just edited.
Anyway … it’s probably a low priory bug. But just thought I’d share what I found.