Version Information

Minecraft: 1.12.2
Forge: 14.23.5.2847
Iron Chests: 1.12.2-7.0.72.847

Report Information

Rendering Issue with diamond and crystal chests, they're both crystal chests (See images below). I'm not exactly sure what could be causing this, but it persists through game restarts and computer restarts.

Steps to Reproduce

I don't believe that redoing what I did will produce the bug, but it here's how it happened: I was needing to relocate the chests elsewhere and broke them without emptying them of various items (other modded items included). When in my inventory, the chest appears clear, however, when placed down, they appear to be diamond chests (The Items can be seen clipping through the sides as they do their floating animation). When I look at the right chest, they both turn clear, but if I look at the left one or anywhere else, they turn back to diamond.

There were no crashes in this bug

edit: added forge version

Are you able to provide a full list of mods that you have installed, and a copy of the world? It might be easier for me to duplicate this issue with your world since sometimes I am unable to recreate them.

Are you able to provide a full list of mods that you have installed, and a copy of the world? It might be easier for me to duplicate this issue with your world since sometimes I am unable to recreate them.

World: Survival.zip (Google Drive Link)

Mod List:

If it helps, here's a video of what happens:
https://www.youtube.com/ZdU_BKr7kyI

As it turns out, and I wish I had noticed before, but the issue seems to be caused by being on the border of a chunk and traversing between either chunk the chest is on. I placed the chest a few blocks from the border of said chunk and the issue disappeared. This is most likely due to Optifine or Minecraft's rendering engine.