Sometimes block quads renders as black or white, partially independent of options and AO/Diffuse lighting. This happens to random quads of complex models with size smaller than one block

This is bubble coral from my upcoming mod, its model is here

• blockstate json
• block model
• block code (if necessary)

I tried to fix it with shader, disabling AO and Diffuse have small effect, but quads are still wrong shaded

• material map
• material

I saw the same issue on wall mushrooms from Better Nether mod. Probably this is related to small vertex size or their random rotation

What block is in the picture? Looks useful for testing.

Thank you for the extra detail. Does it look correct with Indigo when Canvas isn't running? (indigo is the default renderer that comes with Fabric.)

Yes, Indigo rendering is correct

Indigo:

Canvas:

Should be fixed in the most recent GitHub build. Curseforge release still a ways off.

Please advise if still occurring.