Vines seem to generate at very low frequency on lush caves. Compared to the amount of cave vines, patches of vines seem to randomly generate on the ceiling or walls with only a single vine, similar to glow lichen.

This report only states the amount of vines on generation. Spending a fair amount on time in these caves highers their quantity due to randomTickSpeed.

Observed result

Barely any vines generate on lush caves, compared to cave vines.

Expected result

Lush caves would generate with a higher frequency of vines. Relevant screenshot from MC Live 2020, the lush cave here had a vast amount of vines.

How to reproduce

1. Generate a single biome world of lush caves.
2. Find some cave, the bigger the better.
3. You'll find low amount of vines, generating in a similar way to glow lichen.