Well I made myself a resource pack that only I use and I edited the generic_54.png file, which is supposed to be the largechest GUI texture.
But when I got into the game it was glitched.
Steps to Reproduce:
1. Make a resource pack and edit it the way you want. Or put my largechest GUI texture on it to see.
2. When done editing the texture, open up minecraft
3. Go to a world and put down a large and a small chest
4. Open them and you should see the problem, easily spottable with small chests. Might have to look around for the problem in the largechest gui.

The picture that I added is supposed to be the large chest GUI but it isn't. On small chest the texture is like cut off near the bottom of the changed area and on big chests its a little bit wierd. Look at the bottom corners of the changed area.
How to fix:
Should add a seperate texture for big chest GUI and small chest GUI, maybe even a enderchest GUI for more dedicated texturepack makers. The red squares show where the problematic areas are. Hope you see this and even fix this!

• HybridGermo