Aerosoft A320 IAE Professional.
Boarding was through Jetway.
Multiple trips is disabled but don't understand how this may be an issue when a bus is not involved.
Estimate Passengers numbers is unchecked.
Visually what I expected to be the last passenger walked onto the plane (after 176 had shown in the incremental count shown on screen) but that was where it ceased to work.
I'll fly the route again tomorrow with the same configuration and see what happens.