This has been happening with Cubase 9 and up. At least since I work on 4k displays. I randomly loose the top toolbar/header for some reason and I simply cannot get it back without closing and restarting Cubase.
Weird thing is, when I close the session, is seems like it also closes Cubase. As if when the the header disappears, Cubase is closed but the session remains open. Very odd behavior anyway.
Has anyone ever had this issue?