Applications started from the dash often do not receive focus
On a fresh install of Ubuntu 19.04 applications that are started from the dash inside a Wayland session often do not receive focus. The behavior is inconsistent. Some applications (like the terminal) always properly get the focus. Some like GEdit en Chromium mostly do not receive focus until suddenly they do. It seems to depend on other applications that are already open and may have the focus but I could not discover the exact pattern.
Once clicked or Alt-tabbed into the applications work as expected. But when you simply start typing after opening, for example, GEdit the keystrokes may go to an application window that has just been obscured buy the newly opened one.