Slabs from BetterNether render incorrectly with FullSlabs

[SplendidAlakey]

MC 1.17.1 Fabric loader 0.12.5; API 0.42.1 FullSlabs 3.2.1 BetterNether 5.3.8

To reproduce:

1. Enter a world, grab any of the BetterNether slabs (e.g. Small Nether Brick Tile Slab, Nether Bricks Roof Tile Slab, Nether Sakura Slab, Basalt Slab etc)
2. Aim at the top of any block and place the slab

Screenshots:

With FullSlabs:

Without FullSlabs:

Logs:

With FullSlabs: https://gist.github.com/Footage2-Amply-Pounce/84fa164a5b6062607a25f8d338b9aaf8 Without FullSlabs: https://gist.github.com/Footage2-Amply-Pounce/5e5c01ba7fc96330d848146d5fa3357e

[SplendidAlakey]

Closing this since the mod is discontinued.