Create trigger that triggers when audio in a marker completes

Hi everyone,

I'm trying to create a trigger that triggers when the audio in a marker completes.

Normal audio in the timeline will do this, when the timeline ends.  But if I use the same theory for a marker, it means that the audio in the marker may not have finished by the timeline ends, cutting it off.  If I extend the timeline to allow for the marker, this works, but it depends on how long the learner takes to click the marker.  If they take too long, the timeline ends too early.  If they click it immediately, it means that there is a gap before the timeline ends - and the learner will wonder what the delay is...

Any ideas anyone please?

Thanks in advance!  Kassy