Hey Dick,
So, either this was never working or google has changed something in the API. We are using a drag_end event to load new markers. So basically when you drag the map and when you release the mouse button the drag_event is fired and this is when we say - load new hotspots. Now when you use the find directions -> there is no dragging taking place and that's why we are not loading any hotspots.
As I said - either this never worked and nobody noticed for 2 years, or it was working and something changed with the API. Anyway, I've now changed the call from drag_end to center_changed. The map center seems to always get updated - no matter if you do a drag or the map changes in response to a direction search. Please try the latest dev. release and let me know if it also works for you and if everything else seems ok.
Kind regards,
Daniel