MC Version: 1.20.1
Forge Version: 47.4.0
Mod Version: 12.9.14
Transparent custom framed drawers do not render correctly when adjacent to other blocks.

This should be fixed across versions now.

With one special note for 1.21.8: translucent blocks are a little funky and differ based on platform. But cutout blocks (like normal glass) are fine and no blocks give a world XRay effect.

Still present in 1.21.

Framed drawers have proper support for cutout and translucent materials now in the latest 1.21.1 release. Will get ported back to 1.20.1 and 1.21.8.