Delve "Beyond" nodes spawn ALOT of rares

I just ran a Delve "Beyond" node. When I kicked the bucket, there were at least 6 Arch-Nem Rares on screen (maybe 2 more off-screen) + 1 Beyond boss.

Depth was 144. I'm playing boneshatter slayer with around 3 Million pinnacle boss dps. But maybe I was still killing them too slow :D

Just letting you guys know, since this might be unintended after the normalization of rare spawns :)