The bug
Vines used to generate randomly in jungles in 1.13-1.13.2, but they no longer generate on random blocks above sea level in the 1.14 snapshots.
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Comments 6
This is a jungle generated in 19w46a and I do seem to see random vines everywhere on trees. Did vines used to get generated at other locations as well?
With worldgen datapacks a thing, people trying to place vines with the VINE configuredfeature will find no vines are placed at all due to this bug. Definitely has gained a bit more importance now in latest minecraft versions
Relates to MC-129501