vine issues
MC-31100/setblock and /fill do not update the placed block(s) consistently
LowMC-46209Vines don't drop as items when their supporting vine is sheared
Confirmed
MC-50729Vines orienting improperly in inside corners
Fixed
MCPE-7764Vines generated on trees (leaves) are destroyed when updated
Fixed
MC-114007Mobs often fail climbing down ladders or vines
Low MC-118283Vines can't be placed below non-solid blocks / get deleted by doing so
Duplicate
MC-118346Blocks that will be replaced when another block will be placed on them do not work with CanPlaceOn tag
Fixed
MC-123140Vines lost when shearing many at once in a single block space
Low MC-132561The collision box with /setblock vines (damage 0)
Duplicate
MC-1966754 jungle sapling no longer bulk grow when jungle tree size is 2x2xn
Duplicate
MC-225077Vines can spread upward to non-full blocks
Fixed
MC-231189Vines can generate floating when intersecting underground structures
Normal MC-257366Vines, glow lichens, and sculk veins attached to the sides of shulker boxes are only destroyed when shulker box fully opens
Fixed
MC-258192Endermen holding vines or glow lichen no longer drop them upon being killed
Normal 
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