hm2johnson wrote:
I don't believe its a bug, all you have to do to get the search bar to show up us drag and drop the list of emails on the left side of the screen
The bug shows up when you search, click on an email, switch to another open app (e.g., by clicking a link to a website), and then try to return to the list of emails retrieved by the search.
There have been numerous posts about this issue. See below for a list of some that I've found so far.
https://discussions.apple.com/thread/7694784
https://discussions.apple.com/thread/7686391
https://discussions.apple.com/thread/7693913?answerId=30752094022#30752094022
https://discussions.apple.com/thread/7681209
https://discussions.apple.com/thread/7699679
https://discussions.apple.com/thread/7687236
https://discussions.apple.com/thread/7698277
https://discussions.apple.com/thread/7690703?answerId=30766050022#30766050022
Please be sure to report this bug to Apple at http://www.apple.com/feedback/ipad.html. It is more likely that the problem will be fixed if more people report it.