Chrome Version: 72.0.3589.0
OS Version: 11191.0.0

What steps will reproduce the problem?
1. attach a monitor
2. open a browser window
3. open devtools console (Ctrl-Shift-J)
4. change display mode from docked to separate window 
5. see devtools open on primary screen, but with the window/title bar above the top of the display
6. window *doesn't* span the two screens, so the devtools window can't be moved

What is the expected result?
the window should have spanned the screens correctly, or at least not been opened on the primary screen but with the window bar inaccessible (negative Y coordinates)

unfortunately, once i get into this state and i manually close/re-open windows, i can't get it to reproduce.  but this is the third or fourth time it's happened to me.

UserAgentString: Mozilla/5.0 (X11; CrOS x86_64 11191.0.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/72.0.3589.0 Safari/537.36