trial of chaos ultimatum bug

So I launched an ultimatum in order to get the 4th ascendancy, and when I clicked to enter the first zone I got the loading screen where your entire PC freeze and you have to hard reset.

When I relogged into the game, I was back at trial of chaos entrance and the inscribed ultimatum is gone as if you failed it.

Same thing happened earlier where the game crashed during an arena in trial of chaos and when you relaunch the game, you're back at square one with inscribed ultimatum lost.

Players should be able to get back in the zone they were without losing the key as they are quite hard to farm.