Hi, I've this problem since Yosemite and still persists after 10.11 clean install: every time I search for something directly in the searchbar, after I press return the window with searching suggestion, bookmarks and history doesn't hide. ONLY in fullscreen mode. It's very annoying because I must click somewhere in the screen to make it disappear, and this problem appears only with google search and duckduck. No with bing or yahoo. I tried everything: clean install, update all osx versions, delete all preferences files, create different users. At this point, I can't figured it out if this problem is related to iCloud or not. Someone with the same, tedious, bug? Thanks!