Created attachment 356605 [details] Zip file containing both screenshot files described above. Specifically for Edge on iOS, but also happening with Safari on iOS in some situations, it seems that when an input box is pinned/fixed to the bottom of the viewport, the keyboard suggestion bar completely hides the input area. Two screenshots are provided, one shows the input area visible on the screen at the bottom of the page, the other shows the keyboard and suggestion bar visible after the input area has been tapped, but the input box is now hidden behind the input area.
Here is a link to the Meta.StackExchange bug report about this same issue.
<rdar://problem/46492212>