Create instrument track.
insert a few notes manualy.
the last note is active.
activate the first note, it turns blue.
erase the last note with the eraser, without first clicking on the last note .
first and last note are gone, why?
Even the first note is active it should not be removed.
This is very tricky while composing, if somewhere a note is active you erase it while
erasing a note somewhere else.