When webanno is started (not headless), after some time it puts up a little window with a "Shutdown" button.
On Windows, the box and the button are "selected". This has an unfortunate consequence. If while waiting for webanno to initialize, you have another window open (like an email composition window) and are typing, then what happens is that in the middle of typing some word, the WebAnno dialog box/buttom appear and become selected, and the next keystroke goes to that window / button, essentially "pushing" (by accident) the shutdown button, which then shuts things down! -Marshall
