New players can't die during leveling?

I don’t know if people are actually afk farming, but there is in fact a buff when in Dragonflight zones that prevents you from dying. Friend of mine and I were discussing it the other night trying to understand why the buff wouldn’t wear off after “dying”(triggering the effect) once…turns out it just stays there. Not sure if it’s meant to be a one-time cheat-death mechanic every so often or if it’s supposed to keep refreshing but last I checked it was always on and you had to manually remove it to actually be killed. It’s one of the aspect buffs you can get.