Tempest shield not acting as aura

Tempest shield on previous patches was a skill that provided an active buff, similarly to Blood Rage. It wouldn't preserve the last known state on changing zones, which was the expected behavior for active buffs.

However, on 3.16, tempest shield got converted into an aura that has mana reservation, and as such, I would expect it to remember whether it was active or not between zones and on logging in. I would also expect it to deactivate if invalid (e.g. not wearing a shield), similarly to how one aura gets disabled if you suddenly don't have enough reservation reduction (or reservation efficiency in current terms).

The current behavior is the following:

Every time I log in, I need to reactivate the aura. It remembers if it is active between zones, but not between logins.

What I would expect from an aura:

I have to reactivate the aura every time I die. It should remember whether it was active or not between zones and logins.