The person is able to respond to visual / auditory cues but is unable to track the cues.
A hearing problem is an unlikely cause for not tracking because they could hear the same sound well enough to respond before.
A visual problem is an unlikely cause for not tracking because they could compensate by listening.
Fatigue is however, a possibility and you can check by starting your next visit with moving to the same sound.
Score
The tentative score is ACL 1.2.