No chest for 3 crest Elder Rift

I ran a three crest elder rift a little bit ago and there was no chest after defeating the boss. No mail with “forgotten items” once I exited, either.

Also, the in-game help system is trash. Not that the site is much better.

you should specify what type of crest you used

Would it matter? The other threads I’ve read with this same issue had no response or resolution, just closed after 30 days.