Hello, for some reason, the generation of stellafite started to do this in my worlds, I have optifine installed but it never did that before, I was wondering if you got any ideas ?

I got a chunk in with the same glitch near and using Random Things Chunk scanner, I saw that they both had stellafite.

Also I would like to add that any entity that goes into here will be transparent, mobs like creeper can walk on the block that are "there" (i saw that using a health bar mod over the mob head), but for players you fall down as if you had slow falling.

Update on the issue, I still have the same problem even without optifine.

The Sellafite Blocks will be removed in the next update