HA probe fails to enable or disable queues.
This was found on HA probe versions 1.43 and 1.44.
Some versions of the HA probe have been released with the following setting in the <setup> section:
queue_activate_method = postroute
This needs to be:
queue_activate_method = queue_active
Changing the setting to queue_active tells NMS to use the hub callbacks to handle the queue activation/deactivation.