What happened?

Some biomes have wrong ceiling blocks (found this in grasslands). In this case it is covered with Nether Moss instead of Netherrack

BetterNether

7.0.2

BCLib

2.0.5

Fabric API

0.56.0

Fabric Loader

0.14.8

Minecraft

1.19

Relevant log output

none

Other Mods

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

Floor too, and probably filler blocks

Should be fixed in the just release 7.0.3 update.