You created a dynamic autoscale scaling plan in the Azure portal and assigned it to a pooled host pool with defined ramp-up, peak, ramp-down, and off-peak schedules. Several days later you notice that session hosts are never being started or stopped by the plan, even though the schedule thresholds are clearly being met. The scaling plan shows as enabled and correctly associated with the host pool. What is the most likely cause that you must remediate?