1.20.1 Glass slabs from 'More Slabs, Stairs, and Walls' have incorrect top and bottom textures

[arctlw]

As title says, vertical glass slabs from More Slabs, Stairs, and Walls don't render properly and show the 'null' texture. Also the x and z-axis faces show double slabs instead of just a slab texture when placed vertically. Disappears when it joins another slab to form a block.

[peow]

i can confirm