starting to to notice that blaze are not stacking and if you get about 5 or more and attack them theye all disappear and and happens every time with in a 5 minute time period. Slight up date looks like i was just catching it a unlucky timing. still i guess they don't stack
Cannot reproduce. Just tested blaze stacking and it works fine. Keep in mind the mining world does have a butcher.
You are in the nether. Mob stacking only exists in the Mining world. You can read more about it here: https://ecocitycraft.com/forum/wiki/mob-stacking/