Trial of The Sekhemas lose key

Hello, I'm writing because I have a problem.
Yesterday, a bit late, I killed Balbala and got the key to Balbala's Barya.

So I went into the trial, put the key in the relic altar, and the door opened.

It was a difficult day, and I was exhausted. My honor dropped to zero, and the dungeon ended strangely (I ended up on the ground without dying, but my health returned).

I then returned to redo the trial I'd lost on the last level. The key is no longer in the relic altar, nor in the stash next to it, nor in the relic locker; there's nothing in my inventory.

I tried resetting the instance, but nothing changed.

I spoke to all the characters again, including those on the caravan and balbala but nothing changed. I even killed the boss 10 times to get it to drop more loot, but still nothing.
What can I do?

Balbala holds the barya if you die on your first sekhema, speak to her at trial's entrance.
There should be a dialogue option like "attempt the trial again" or something like that, if not it's deffo bugged.