Trial of Chaos altars can bug out on multiplayer. Orbs on failed multiplayer can also bug.

We had an instance when running Trial of Chaos where the altars with the vaal orbs you have to carry can bug out.

How it happened is: I did the first altar, then my friend did the second altar, but it didn't disappear from my map as if it was still waiting for an orb.

Then I tried doing the third, and when I clicked on the one my friend used I got an error message that it can't be used (that it requires an orb to use? can't remember which error message it was) an clicking the 3rd altar worked but we had a bugged altar and no vaal orb to interact with.

In order to exit the trial we had to relog.

After this, the item you use for starting the trial(not the djinn barya, the other one) did not have the message on it that it awards ascendancy points on success for my friend, while the djinn barya correctly did.