Caves & cliffs experimental features bug

I've been noticing that there is less cave opening and the only type of cave that exposed to the surface is aquivers.I've created 3 different world with the caves & cliffs experimental features on and i didn't find any cave opening in those 3 worlds,the only thing i see that generate in the ground is aquifers.And there is another issue,Deepslate didn't replace stone in between Y0 - Y-64,jungle leaves texture is not transparent.