using midi keyboad switches off note input mode after tie entered from computer keyboard.

While in note input mode using a midi keyboard the note cursor fails to advance after a tie is entered from the computer keyboard keyboard. Instead notes entered from the midi keyboad add to the current chord. Ctrl-Z will backout the added note and allow note input to continue as expected. This can be recreated using the following sequence:
(kbd=computer keyboard, midi=midi piano keyboard):
kbd: N 4 0
midi: e
kbd: 5
midi: d#
kbd: j3+ (I don't think the enharmonic re-spelling is significant to this problem)
midi: e d# e
At this point the last e and subsequent notes end up in the same chord as the d#. Ctrl-Z to undo the last e allows me to continue in sequential input mode.