What happened?

All vines are generated from only one blockstate - bottom, ignoring other middle states

Updating blocks fixes issue, this means that the bug is in feature generation

BetterNether

7.0.2

BCLib

2.0.5

Fabric API

0.56.0

Fabric Loader

0.14.8

Minecraft

1.19

Relevant log output

No logs

Other Mods

better-end-2.0.2
iris-mc1.19-1.2.5
sodium-fabric-mc1.19-0.4.2+build.16

Should be fixed in the just release 7.0.3 update.