Hi Andy, reading it this way, the thought occurs to me, that the occupancy feedback is faltering . ( bad contact)
With the help of the Tour inspector and the occupancy monitor, observe whether all the detectors of the route being used come on at the right time and are also processed.
Also check in the vehicle dispaly (from left to right) whether the order of the occupancy detectors and length are entered correctly.
greetings
Rupert