Last update: Got help from support and they told me this would be resolved with next update.Problem was a known issue with the 3.10  version related to the Redfish protocol.Just updated to ver 3.10.1.54 and everything is fine again 
After upgrading to 3.10.0 a lot of devices show up with ip address instead of host name.I have run discovery several times but still most devices show ip address, but not all.The Discovery settings is set to : General Device Naming:DNS - Server Device Naming: System Hostname. I have tried to delete a device and rediscover, but it still shows ip address. Before upgrading all devices was listed with host names    
Showing IP instead of hostname in Devices