blending issues
MC-240203Replacing bedrock with deepslate in old chunks causes a notable discontinuity
Duplicate
MC-241693Icebergs don't get blended properly when upgrading to 1.18
Duplicate
MC-241698Structures do not respect blending and biomes
Won't Fix
MC-241705Pirate Ship generates without water in converted world
Duplicate
MC-245809Update griefs biomes if a datapack affecting world height is installed
Duplicate
MC-248210Harsh chunk borders appear when upgrading to 22w03a
Fixed
MCPE-176970Deepslate transition ceiling underneath pre-Caves & Cliffs chunks are too noticeably flat on big caves
Confirmed