With strictly follow and risk for foul trouble and putting a trainee as starter, backup and reserve I can think of only 2 scenarios when my trainee won't get 48 mins - if he's fouled out or injured. And of course, you can't have blank positions in the lineup. That's important. I've never experienced anything else with this setup. And Manon, this is regardless of my roster and how the game goes.
Checkout my last SC. I set everything up correctly and the PF still got subbed out in garbage time. It can happen. I guess the reason probably is that I was doing out of position training.