The Update Subnetwork geoprocessing tool for a specific subnetwork fails and returns the error message, "Error 160924: One or more starting points are outside the specified tier".
This is a duplicate of BUG-000146572. This is found to share the same cause as BUG-000146572. In this other issue, validation did not register the new active terminal for the subnetwork controller after disabling the previous controller on a different terminal.