I use my iPad a lot when editing profiles, and I keep having this issue where scrolling up or down (obviously using my finger) suddenly stops working. Basically, the edit window won't scroll up or down, but instead appears to quickly judder up and down, flashing like a bad 8mm film. The only way I've found to get it to behave is if I can somehow reach a different edit window (like "Explain your changes") and click on that, after which it works for a while. I've had some tense moments where I've done a bunch of edits, and am unable to reach the "Save Changes" button.
It may be an iOS issue, as I've seen it on both my iPad and iPod, both of which are running iOS 11.1.4. Wondering if anyone else is having this problem, or if there's a known solution.