IGMP Querier with Bluecoat ProxySG

Hi all
I ran into a problem with VIP for high availability on Blue Coat ProxySG. Both ProxySG send multicast packets
to advise the other ProxySG that it is up and the priority is contained in the multicast packet, along with the IP address of the VIP and so on. 
This worked fine with Catalyst switches. Unfortunately it does not work over the newly installed Nexus switches.
There is no Vlan interface on the switches. The Vlan is only trunked through.
I found a hint that IGMP Querier could solve this issue. After configuration of IGMP Querier end acitvating Multicast on ProxySG
a IGMP group is built and all seems fine.
In a trace I can see IGMP Queries leaving the Querier but no answer from both ProxySGs.
After 6 minutes (3 times Querier Interval) the group disappears and both Boxes become active.
The topology looks like this:
Bluecoat1 -----N2k------2*N5k-----2*N7k-------Inter Datacenter Link-------2*N7k------2*N5k-----N2k-----Bluecoat2    
                                    vPC         vPC                                             vPC          vPC
On both N7k in the left Datacenter is a Querier configured:
vlan configuration 85
  ip igmp snooping querier 10.101.22.7
          
# sh ip igmp snoop querier
Vlan  IP Address       Version   Expires     Port
85    10.101.22.7      v3        00:01:22     Switch querier

I wonder if an additional setting has to be made. Could it be that the Bluecoats ignore IGMPv3?
I  would be very grateful for a hint.



 the solution:
we are exeperiencing the same issue described above, with a similar network layout

and we are changend muticast adresse with the ip on the range

224.0.0.69-224.0.0.100     Reserved     [IANA]