So I’ll have a monolith goal to “Slay Enemies to reveal Jack Johnson” or whichever random boss is supposed to jump out from the bushes at me. But after killing enough enemies, it’s not Jack Johnson that spawns, it’s yet another Scarab Broodkeeper.
Killing the Broodkeeper defeats the node so there’s no problem with progression. It’s just really weird that the Broodkeeper keeps spawning in place of so many other node bosses.