I have an Iphone 11Pro that was recently updated to IOS 14.3. I used to have small lettered area in the upper left hand corner that would allow me to go back to the app I left if I went from it by a hot link. I.E. If i was in facebook and messenger had a message, the word "FaceBook" would be in the upper left hand corner of my screen allowing me to go back to facebook. This in no longer there and it has been replaced by "Search". How do I get the last app back and get rid of the search?