After upgrading from Ubuntu 16.04 to 18.04, The menu in Terminal does not open from the keyboard.
Holding the ALT underlines a letter in each menu header as normal, but pressing that key doesn't open its menu :-(
Pressing ALT + Spacebar still opens the window menu, but the entries don't show any key shortcuts (no underlined letter). The only option seems to be pressing the down arrow until the entry and then enter.