I think I narrowed this down to involving Werewolf Packleader, this only seems to happen with my Werewolf characters who have Packleader morph. I think something with the summoned wolves is causing this issue.
Yep, it's Werewolf related. Going into an instance as a Packleader Werewolf removes Werewolf form and it's for some reason applying a summoning issue to your current active companion when changing instance/zone.
The temporary fix I found is to summon your companion, then summon an assistant like a banker or merchant, port to inside a home, logout/login, then walk out of the home. This fix will work until the next time you decide to go Werewolf.
Edited by phaneub17_ESO on 1 January 2024 11:44