She and I play ESO on an Xbox Series X.
For the past couple of days, every time I log into my ESO account on the Xbox, her addons are applied to my character and mine do not load. Going to Manage Addons (where I can change addon options) shows her addons but not mine. However, when I use the Settings > Addons browser to view installed addons (so that I can uninstall hers), only my addons appear. If I search through the addon browser for the addons that are incorrectly applied to my account, only then do they appear as installed in that last. There, I can uninstall them.
It is worthwhile to note that when I play ESO via Xbox Cloud or Xbox on PC, this issue does not come up. Only my addons are displayed and loaded.
I've quit the game and did a power cycle on the system to no effect. I suspect my only option is to manually search and uninstall a dozen addons and libraries, but I wanted to report that this bug is possible in the Xbox version of the game.