MC: 1.16.5
Forge version: 36.0.46
FramedBlocks version: 2.3
Do I have Optifine: No, and no other mods that change rendering in any way

Blocks that are facing South have inconsistent rendering with the other blocks.

Here are 4 slopes - the same issue happens even when blocks are added to texture them.

Here are a handful of blocks, all facing South:

Do you have FerriteCore installed?
If you do, please disable the bakedQuadDeduplication option in the ferritecore-mixin.toml config file.

😅 I had installed FerriteCore between opening my last issue and this one and forgot that I did. That fixed it. Sorry for the inconvenience (and the late response, been a bit busy)

No problem, thanks for comfirming