"Computer Keybard Input (Suspended)"? message

While editing in Score, selecting notes with the mouse, and using the tab key to get to the “Info Line” (to adjust the “Start” position for example)…

… when tab-ing back to the editor, my “Computer Keyboard Input” icon TURNS RED and says “Computer Keybard Input (Suspended)”
(See attached image.)

How do I get this to stop?? I don’t want it to suspend, because is does wacky things when I continue editing as usual.