1. The first issue was the lava bomb that Netherite Monstrosity launch leaves lava source on the ground and it doesn't absorb back in(it heals in lava, so it makes invisible to defeat)
2. second issue is the field for boss fight are fragile, easy break by Netherite Monstrosity's new sprint ability leaves lava that lock inside the pillar spills in , also the sprint might cause Netherite Monstrosity destroy the iron fence leads dash into lava lake where it escape boss fight zone & heals itself.

(the new blackstone smith looks awesome, but i think it still need some improvement for the boss fight experience).