4 ESX Hosts in a cluster configured for HA.
Host isolation response set to Power Off VMs.
There is loss of power to all network switches for an hour, so all ESX hosts lose network connectivity and go into isolation, then all VMs get powered off.
Power is restored to the switches one at a time and the ESX hosts come back online in the network.
Should HA or other mechanism have tried to power up the VMs automatically as some hosts are coming back online?