I have run into a new glitch or bug in this
Today, I sent ambulances and an EMS Chief on an "active shooter" that showed "patients". They were cancelled and then the mission would not complete until I sent ambulances after all units on scene. I did so and they were again cancelled before arriving, yet the mission still did not complete.
Then, on another mission "Bus Fire" that showed multiple patients, I sent an EMS Chief and an MCI. They both were cancelled and when all other units on the scene the mission required ambulances. I again sent an ambulance, EMS Chief and MCI as there were 8 patients (MCI transports 7). All of them were cancelled again and I kept sending them back until they finally got there and transported