I just logged in on Test server to play around whilst the latest update is being applied and have you deliberately made the change to Sorcery whereas you can no longer use Fury & RSK together in the same loadout? On Test you are unable to use both at the same time as they de-summon each other.
Must have been glitched before then as i have been using both in loadout for a few weeks. only just changed to sorcery so had no experience or need for pets to be honest.