What would happen to AutoStart Resource Group if there is a complete network failuer?

In our scenario, the switch went off. When network was restored, the nodes do not respond. We need to restart the hosts and then the AutoStart services.

The resource groups become online only after that. Sometimes, we need to restart the AutoStart services a couple of time to bring it online. EMC Support says there is a problem with isolation script at the end having some special characters but we never modified isolation script so why should there be a problem with it and there is no reference to isolation script error in AutoStart logs also.

Please suggest how to resolve this situation. I am usign AutoStart 5.3 SP1 and have faced this issue in both RHEL and Solaris environments with iSCSI shared storage.