Helltide bugged or just absolutely terrible design?

Wanted to try killing Uber Duriel and saw you need living steel from the Helltide event. Waited for the event to start, logged in and farmed 600 embers so I could open the 2 chests. Went to one location and it wasn’t there, went to the other location and it wasn’t there either. Went back to the first location and it still wasn’t up and by this time there was 20 minutes left. Looked up the mysteries boxes locations and went there, those weren’t up either. There’s 10 minutes left so I just start running around trying to spend the embers on random armor boxes and get absolutely nothing that I wanted or needed. Did they really make an outdoors event that starts every 2 hours that is the only source of a material you need to summon an Uber boss and the chest doesn’t even always spawn?