cameron,
Can you try to discover just one iDRAC6 that is showing this symptom ?
Also try running this command from OME server command prompt:
winrm enumerate "cimv2/root/dcim/DCIM_SystemView" -r:https://$IDRACIPADDRESS/wsman -u:$USERNAME -p:$PASSWORD -SkipCNcheck -SkipCAcheck -encoding:utf-8 -a:basic -format:pretty
Replace $IDRACIPADDRESS, $USERNAME and $PASSWORD with actual values.
The above command should return system info including "PrimaryStatus".
Thanks,
Raj Shresta