An Xbox One achievement is tied to unlocking an onyx weapon which you can get by collecting canopic jars in the game. Canopic jars appear in a level at the location where one of your friends died.

The problem is that the jars don't seem to appear in game anymore. I intentionally died a couple of times for a friend and he did the same but we can't find the jars at all in our game. Furthermore, if you look at the achievement tracking website trueachievements.com, it seems that no one unlocked the achievement since Sept 28th.

(Look at the "Recent Winners" column on the right)

Is the feature officially dead? Is there something we can do to make the jars appear again?