Strangely what I saw as well was that after Airwave came up, there was some info in the graphs for these IAP clusters, so it had obviously contacted them.
When I changed the Airwave ip in the VCs, the info in the graph stopped from that point.
In my case, changing the organisation made no difference, but it was the reboot that made them come back. This may be due to an older version of code on the IAPs though.