Curios No Longer Dropping in Delves

Curio upgrades for Brann no longer seem to be dropping. They were dropping in early access with every Delve, and now I haven’t seen a single upgrade since. I’ve run regulars and bountifuls at every level up to and including tier 8 and nothing has been dropping.
I can’t find any guidance on this, and the sudden drop off a cliff in terms of drop rate is making me think this might be a bug.

Same here I have many that are 1/4, the same level I had them in early acccess.

checking dps meter (I solo tank T8 with paladin) Brann’s dps has been chopped in half. I just ran a delve and it was painful and slow.
This change really sucked the fun out of running it solo for me and I really enjoyed them previously.

I got Relicblood of Zekvir twice (ranks 3, and then 4), and at once point my Lifeless Necrotic Relic upgraded from 1 to 3, but other than that, all of mine are sitting on 1 (except for a single Light-Touched Idol at 2) - which I think I got before the start of Season 1.